Fix Navigation Drawer Logo on Android 5

Closes #1350

See merge request briar/briar!864

Removed unused reminder notification SVG

See merge request briar/briar!862

Dark theme changes based on designer feedback

Closes #1250 and #1251

See merge request !861

Run UI actions only when the activity is added to the fragment.

Closes #1336

See merge request briar/briar!858

Add more vanilla bridges

See merge request !859

This is different from the previous behavior
where we only check if it is not detached.

Add an option to not show the sign-in reminder

Closes #47

See merge request briar/briar!851

Also change the logo to a logout icon

This is done via another preference in the settings screen
and an action button attached to the notification itself

Removed unused ReferenceManager

See merge request briar/briar!856

Tor Bridge Support

See merge request briar/briar!847

This also changes the way bridges are used.
Instead of using the torrc config file,
bridges are now activated via Tor's control port.

Disable resource shrinking for release builds

Closes #1334

See merge request briar/briar!854

Fixed padding in rss_feed_import, list_item_crash, power_view

See merge request !831