Updated manifest
Added new constants
Changed CpuPlayer to Sign Out and included CpuPlayer in the other 2 game modes
Added progress spinner while waiting to be matched up
Extending AbstractCpuActivity instead of Practice
Using .get() while passing score because mSetCount was changed to an AtomicInteger
Moved getDiffictulty method to ActivityUtils
Modified to use Constants class for Keys
Modified to use Constants class for Keys
Made Player Comparable and Parcelable
Removed debug prints
Added removeGame method
Modified layouts
Added new Strings