Facebook iOS SDK 3.5.2

Summary:
     Bug fixes. See https://developers.facebook.com/ios/change-log-3.x/

Reviewed By: jacl

Test Plan: Release Testing.
bug fixes
Facebook iOS SDK 3.5.3

Summary:
     Bug fixes. See https://developers.facebook.com/ios/change-log-3.x/

Reviewed By: jacl

Test Plan: Release Testing.

@update-submodule: vendor/OCMock
Facebook iOS SDK 3.6

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

    Upgrading from 3.5
     https://developers.facebook.com/docs/tutorial/iossdk/upgrading-from-3.5-to-3.6

Reviewed By: jacl

Test Plan: Release Testing.
Facebook iOS SDK 3.7

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

    Upgrading from 3.6
     https://developers.facebook.com/docs/tutorial/iossdk/upgrading-from-3.6-to-3.7

Reviewed By: jacl

Test Plan: Release Testing.
okok
Merge branch 'facebook' into develop

# By Chris Pan
# Via Chris Pan
* facebook:
  Facebook iOS SDK 3.7
  Facebook iOS SDK 3.6
  Facebook iOS SDK 3.5.3
  Facebook iOS SDK 3.5.2
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