Refactor sound effects

SoundEffectHandler class manages a singleton SoundPool instance.
Refactor color names, other tweaks
Fill board animation and sound
Speech recognition timeout
Increased game board left right padding
Nudge gameboard header
Enhance spoken answer processing

When processing spoken answer text for display, strip ignored prefixes,
as well as ignored prefixes with first letter capitalized
Begin Integration test

discover Espresso is currently borked on Android 5.
https://code.google.com/p/android-test-kit/issues/detail?id=84
Prepare SpeechRecognizer before listen requested
Tweaks
Silence JeopardyClient logs
Version bump
Make logs DEBUG level
Update grade and fill board sound
DailyDouble