clean-up
First steps for my diy night mode.
Quite useless at the moment.
Merge remote-tracking branch 'ankidroid/v2.1-dev' into v2.1-dev-ospalh-special
Merge remote-tracking branch 'ankidroid/v2.1-dev' into v2.1-dev-ospalh-special
Add `color:white` in night mode.
One way to fix [issue #1440](https://code.google.com/p/ankidroid/issues/detail?id=1440).
Merge branch 'feature-fix-1440' into feature-ospalh-special
Merge branch 'feature-ospalh-special' into develop-ospalh-special
Add `color:white` in night mode.
One way to fix [issue #1440](https://code.google.com/p/ankidroid/issues/detail?id=1440).
Merge branch 'feature-fix-1440' into feature-ospalh-special

Conflicts:
	src/com/ichi2/anki/Reviewer.java
Merge branch 'develop-ospalh-special' into feature-ospalh-special
Less indent. No trailing whitespace.
Semi-automatically remove trailing whitespace.
Do night mode with an extra class.
Merge branch 'feature-fix-1440' into feature-ospalh-special
Issue 1710: Check if sound collection contains item before using it.

Sounds are played through in sequence on their own thread. Another
thread could clear the collection of sounds. Check if the collection contains items before trying to use it, and quit the sequence if it
doesn't.
Merge pull request #66 from hssm/Issue1710

Issue 1710: Check if sound collection contains item before using it.
My DIY night mode.
Do night mode with an extra class.
Add night mode to the chess board while we are at it.
Merge branch 'v2.1-dev' into develop-ospalh-special
Merge branch 'v2.1-dev' into feature-ospalh-special