Disable PNG crunching for reproducibility

See merge request !596

Fix pink navigation drawer items with current support library

Closes #1051

See merge request !598

Upgrade Spongy Castle to 1.58

See merge request !597

This can help to prevent non-determinism introduced by the crunching
process.

More information:
https://gitlab.com/fdroid/fdroid-website/commit/e48f9f0773568d92ff764ad3cc79eed0ae2c497e

With enabled and disabled crunching,
the size of the signed release APK was 17809681 bytes.

Related to #164

Fix NPE when some RSS items don't have dates and add test

Closes #1064

See merge request !591

Add Norwegian Bokmål, Occitan (post 1500) and Serbian

See merge request !593

Fix crash when sharing a forum while it was just shared with us

Closes #1069

See merge request !592

Don't add threaded messages to the UI before their parents

Closes #1024

See merge request !585

Remove old Bluetooth code and location permission

See merge request !584

Don't crash if the chosen ringtone can't be loaded

Closes #1044

See merge request !586

Upgrade Tor to 0.2.9.12

Closes #1060

See merge request !590

Libevent 2.0.22-stable, OpenSSL 1.0.2l and GeoIP 2017-09-06.

Keep the reply ID up to date in ThreadListActivity

Closes #1028

See merge request !587

Catch NPE when getting socket input/output streams

Closes #1042

See merge request !589

Works around a bug in Android 7, fixed in 7.1.

Catch IllegalArgumentException when parsing RSS feed

Closes #1040

See merge request !588

Fix bug where RSS feeds got lost when a fetching error occured

Closes #871

See merge request !583

Make debug builds installable alongside official beta build

See merge request !582

Throw checked exceptions for camera errors

See merge request !580

Always play a notification sound, if at least 2sec after last one

Closes #994

See merge request !581

This is the same behavior as Signal.
We might want to adjust the delay later on.

This is also introduces a new BriarNotificationBuilder as a first step
to clean up the Notification Manager code.