(iOS) Fixes to internal logging
Merge pull request #397 from lioncash/master

Misc cleanup
(OSX) Fix build
(Android) Camera-  take out logs
(Logger) Move logger override headers to common logger directory
Build fix - retroarch_logger.h
(Android) Implement all back behaviors
(Android) Implement 'Quit' button functionality - will still need to build
in working code for 'Back behavior = menu button'
(iOS) Remove hardcoded default config paths
(Android) Camera - avoid potential memory leaks
(rmenu_disp) Initialize j to 0
(menu_common) Rename 'Game' to 'Content' - RetroArch is not limited
to games/emulators
Reword README.md and rewrite 'game' strings
(Apple/Android) Rename more 'game'/'emulator' strings
(Android) Move around cpufeatures.c/.h to performance/
(Logger) Some changes
(Android) Replace logo
(Android) Should be backwards compatible with Android 2.3.x again -
2.3.x now uses RetroActivityPast
(PS3) Update assets
(core_info.c) Get rid of potential uninitialized variable warning