move OKBridge UI code out of OKBridge.m into OKBridgeUIHelper
add isFBSessionOpen to unity bridge
create OKAchievement class
add OKAchievementScore
submit achievement to GameCenter
created achievements UI
style updates for achievements UI
fix rotation issues in achievements list
add OKBridge support for achievements
fix issues in OKBridge for achievements
always submit gamecenter achievement progress and update sample app for achievements
log error message when there is no GKPLayer and trying to submit an achievement
submit GC achievement without OKUser
fix/remove log statements
set version to 1.0.5
Merge branch 'development'