fixes #27 :Remove focus on edittext on game configuration activity
Removed auto focus on first EditText in GameConfigurationDialog
Fixes #26: Support for landscape for gameview
Merge pull request #29 from cauchymop/edittext_focus

fixes #27 :Remove focus on edittext on game configuration activity
Code Review Amendment
Merge pull request #30 from cauchymop/landscape_game_activity

Fixes #26: Support for landscape for gameview
Fixes #20: Pass should show a message
Now shows a dialog warning the opponent has passed and prompting to pass as well or continue.
This commit also includes some refactoring that was necessary for the change:
 * gameChanged now passes a Bundle with some additional info if needed (type of change or precisions such as player_passed, player_played for now)
 * a Player now has an avatar instead of just a name which make the association with the black or white stone icon cleaner and opens the way to displaying a Google Plus Avatar.
Merge remote-tracking branch 'origin/pass_message' into pass_message
Code Review Amendment
 * Replaced the pass message dialog by a message in the a message area in GameActivity
 * Kept avatar system but not using it for Stone display which represent the player Color, not its Avatar
 * Introduced GoPlayer as a subclass of Player containing a StoneColor