122 threaded discussions

This branch contains the complete code for the nested forums (UI & back-end).

* This branch has an optional randomized set of dummy test data, uncomment one line in ForumActivity.java and then open up any forum.


See merge request !201

Message Dependencies

This MR adds a new table to the database to hold message dependencies.
It introduces two more message states  (pending and delivered) and completely changes the validation and message delivery logic.

Since this is a **very invasive** change, please **review carefully**. It is better to catch issues now than having to debug things later. If you notice an area without tests, please let me know. I tried to have tests for all changes.

Unfortunately, this MR turned out rather large, but most of it are actually tests and you can review one commit after the other without needing to see the full changelog.

In order to reflect the new states, things that were previously true for `VALID` messages have been changed to now be true for `DELIVERED` messages. This might have changed the semantics in some places and can have unindented side-effects.

The `DatabaseComponent` was extended with methods for:
* adding dependencies
* getting dependencies and states of a message
* getting messages that depend on a message (dependents) and their states
* getting messages to be delivered (by startup hook)
* getting pending messages to be possibly delivered (by startup hook)

The `valid` column in the database was renamed to `state` along with the associated methods to better reflect its new extended meaning.

Since pending messages should not be available to clients, many database queries have been modified to only return results for delivered messages. I might have missed some. Please check carefully. Also you might want to think about how you could create arbitrarily large transactions by sending malicious messages.

Please note that the database version was bumped in this MR.

Closes #382

See merge request !198

and add integration tests that make sure that dependencies are handled
properly.

that handles message dependencies reported from clients.

The MessageValidatedEvent has been renamed into a MessageDeliveredEvent
since there were no real use cases for the former any more.

This adds a new table to the database to hold message dependencies.
It introduces two more message states: pending and delivered
The valid column in the database was renamed to state to better reflect
its new extended meaning.

The DatabaseComponent was extended with three methods for:
* adding dependencies
* getting dependencies of a message
* getting messages that depend on a message (dependents)
* getting messages to be delivered (by startup hook)
* getting pending messages to be possibly delivered (by startup hook)

In order to reflect the new states, things that were previously true for
VALID messages have been changed to now be true for DELIVERED messages.

Since pending messages should not be available to clients, many database
queries have been modified to only return results for delivered
messages.

All added methods and changes should come with updated unit tests.

Please note that the database version was bumped in this commit.

Sort threaded messages generic

Constructed a generic that we can use to sort threaded messages.

Closes #393

See merge request !203

added parent id to metadata and a unit test

The parent id, a necessary attribute for nested forums, was not being added to the metadata in the forum manager. Additionally, a simple forum manager unit was created.

See merge request !202

android.support.v7.widget.AppCompatButton -> Button to use AppCompat inflater

Fixes the following crash that occurs after upgrading to support 23.3.0:
https://code.google.com/p/android/issues/detail?id=174871

Closes #334.

See merge request !200

Fixes the following crash that occurs after upgrading to support 23.3.0:
https://code.google.com/p/android/issues/detail?id=174871

Introduce a MessageContext class to be used by all validators

This change will allow to pass message dependencies from the client validators to the `ValidationManager`.

Please see my thoughts in #382 for more details.

See merge request !197

This change will allow to pass message dependencies from the client
validators to the ValidationManager.

Forum Sharing Status

The new activity shows who you are sharing a forum with and who shares a
forum with you. It is accessible from the overflow menu when in a forum.

![device-2016-05-13-153259](/uploads/2e1c651bc72094018dd0f97a37453d1b/device-2016-05-13-153259.png)

Closes #398

See merge request !191

The new activity shows who you are sharing a forum with and who shares a
forum with you. It is accessible from the overflow menu when in a forum.

Closes #398

Handle invitations to the same forum by multiple contacts

This also uses the new metadata queries in the forum sharing client.

Please note that this is based on !184.

See merge request !188

Closes #391

Closes #392

Replace BDF data structures with classes in forum sharing client

This introduces two new classes for protocol session states: One for the sharer and one for the invitee.
The respective classes for protocol state machines and actions have been moved into these classes as inner classes.
The two new classes replace the `BdfDictionary` that was used before to represent the local state information of a forum sharing session.

A similar technique is used for local actions and protocol messages.

Local actions are just represented by one Enum and protocol messages have their own classes now that also handle serialization into BdfDictionaries and BdfLists.

Closes #378 

See merge request !184

Turn the UI of `CreateIdentityActivity` into XML

Closes #395

See merge request !194

Contact List Unread Messages

Adds unread count as bubble to avatar image in contact list.

Please note that this is based on !190.

![device-2016-05-18-124534](/uploads/647dbdcff73a69eb6cf1814f85cbffe6/device-2016-05-18-124534.png)![device-2016-05-18-124339](/uploads/fa56a44f229234bb86fdebf8f9060927/device-2016-05-18-124339.png)

Closes #399

See merge request !192

Increase Avatar border and change shadow color

![device-2016-05-16-123230](/uploads/8000fb506ee91e61149f838b3f661b46/device-2016-05-16-123230.png)
![device-2016-05-16-123251](/uploads/723bf452704f18b519c3fbdc469595a7/device-2016-05-16-123251.png)

See merge request !190

Convert ExpiredActivity to XML

Closes #396

See merge request !196

Closes #399

Extract ForumFactory from ForumManager

The code for creating forums in ForumManager was used by
ForumSharingManager and also needed by InviteeEngine.
This extracts it into its own class.

Closes #375

See merge request !195

Closes #396

The code for creating forums in ForumManager was used by
ForumSharingManager and also needed by InviteeEngine.
This extracts it into its own class.

Closes #375

Closes #395

Disable Conversation Exit Transition and Animate Bulb

Works-around #318

See merge request !193

Clean up Introduction Session States

...for introducer when both introducees have been deleted.

It can't be deleted when only one introducee is removed, because then all messages in the private conversation with the other introducee will disappear, because their corresponding session state can't be found anymore.

Closes #372

See merge request !189

Upgrade Gradle to 2.13, add local Maven repo



See merge request !186