Updated FacebookService.cs and Social.Android sample

- Changed "username" to "user" on FacebookService.cs
- Updated PickPhotoAsync method to GetPickPhotoUI method on Social.Android sample
Updated component.yaml version to 1.1.3

- Modified version to 1.1.3
- Added the CallbackUrl property in Flicker on Social.Android Sample
Updated yaml, added rake file and fixed loading

Updated yaml, added rake file and fixed loading without api keys
Merge pull request #33 from newky2k/master

Updated yaml, added rake file and fixed loading
iOS unified support
Merge pull request #35 from moljac/ios-unified

iOS unified support
Revert "iOS unified support"
Merge remote-tracking branch 'upstream/revert-35-ios-unified'