Add Facebook Audience Network Plugin
iOS: Add Test Case
Hide Facebook Banner on menuBackCallback
Add comment for test devices
Add interstitial for Facebook
Change some absolute path into relative path in project file
update Authors add giuslape
Merge branch 'develop' into fbAds
Merge pull request #70 from darkdukey/fbAds

iOS: Facebook Ads plugin
Bug #5911  fixed some unchanged error_message
fix login crashing when session state is closed
Merge pull request #72 from joshuastray/fb

fix login crashing when session state is closed
Merge pull request #71 from wuzhiming/plugin_fb_5th

Bug #5911  fixed some unchanged error_message
Merge branch 'develop' of https://github.com/cocos2d-x/plugin-x into v3_facebook1

Conflicts:
	plugin-x_ios.xcworkspace/contents.xcworkspacedata
	samples/HelloPlugins/proj.ios/HelloPlugins.xcodeproj/project.pbxproj