release readPermissions and publishPermissions in dealloc
Facebook iOS SDK 3.18.1

Summary:
    see https://developers.facebook.com/ios/change-log-3.x/

Upgrading:
    https://developers.facebook.com/docs/ios/upgrading/
Facebook iOS SDK 3.18.2

Summary:
    see https://developers.facebook.com/ios/change-log-3.x/

Upgrading:
    https://developers.facebook.com/docs/ios/upgrading/
Facebook iOS SDK 3.19

Summary:
    see https://developers.facebook.com/ios/change-log-3.x/

Upgrading:
    https://developers.facebook.com/docs/ios/upgrading/
Remove AdSupport framework from podspec
Adjusted spacing in comments for consistency
Merge pull request #660 from ogwiz2/dev

Adjusted spacing in comments for consistency
Merge pull request #654 from kilink/fix-loginview-permission-leaks

Fix memory leaks in FBLoginView
Merge pull request #658 from n3tr/dev

Remove AdSupport from podspec [3.19]
Facebook iOS SDK 3.20
Facebook iOS SDK 3.20

Summary:
    see https://developers.facebook.com/ios/change-log-3.x/

Upgrading:
    https://developers.facebook.com/docs/ios/upgrading/