removed symlink to library file
Merge branch 'develop' of https://github.com/GlasslabGames/GlassLabSDK-cpp into develop

# By Ben Dapkiewicz
# Via Ben Dapkiewicz
* 'develop' of https://github.com/GlasslabGames/GlassLabSDK-cpp:
  added start play session API to handle "app start" and "app close" time frames game sessions (now units of analysis) can be treated as levels
  adding unity sdk back to plugins
  removing SDK from unity plugins
  user settings
  using consistent version scheme with cpp SDK version 1.3.0 now released
  up to date SDKs updated the cpp sample to include separate thread

Conflicts:
	examples/unity/Assets/Plugins/iOS/libGlasslabSDK.a