Fixed gradle problems.
No op for init to avoid error.
IOS - Extract permissions from session object
Upgrade to Facebook Android SDK 3.18.1
Fix linter errors and do some code clean up
Merge pull request #695 from dsolimando/develop

IOS - Extract permissions from session object instead of retrieving them with api call
Merge pull request #704 from platogo/upgrade-facebook-sdk

Upgrade to Facebook Android SDK 3.18.1
Merge pull request #705 from platogo/fix-linter-errors

Fix linter errors and do some code clean up
- Fixed null userID in getLoginStatus if app is force stopped
- Fixed no return call for login
removed debug logs
removed unnecessary final variables
switched to isOpened which will check OPENED_TOKEN_UPDATED and OPENED Categories
Revert "No op for init to avoid error."

This reverts commit 65bdae8f32af563f41c38828a4975484f35d28db.
Merge pull request #708 from aogilvie/fix/android-null-userId

Fix/android null user
Upgrade to iOS SDK 3.19.0
Merged with develop
Merge pull request #713 from levsa/master

Gradle build file fixes
Merge pull request #714 from platogo/upgrade-ios-sdk-to-3.19.0

Upgrade to iOS SDK 3.19.0
Revert "Gradle build file fixes"
Merge pull request #715 from Wizcorp/revert-713-master

Revert "Gradle build file fixes"