Frequencies of used letters are restored after the first action
performed by an AI player to avoid player to think that there are vowels
or consonants remaining and really there are not.
Reduced AI spin strength
Added priority queue to perform async synchronizations.
Deleting local user from friends crash fixed.
Added a second database object to be used in async tasks and avoid db
concurrence problems.
Merge branch 'master' of https://github.com/aebsubis/spinspun
Getting actions to apply more than one time bug fixed.
Avoided handler init exception in game list activity.