Merge branch 'release/3.1.1'
Make sure at the Actionscript level that parameters passed to requestWithGraphPath and dialog are non-null strings (cast them as strings if possible).
Merge branch 'develop'
android sdk 3.0 support - first steps
reauthorizeSession
fix "an attempt was made to open an already opened session"
WebDialog support
Merge remote-tracking branch 'emerginggames/master' into fbsdk3.2-android

Conflicts:
	actionscript/default/bin/AirFacebook-Default.swc
	actionscript/mobile/bin/AirFacebook-Mobile.swc
	android/src/com/freshplanet/ane/AirFacebook/LoginActivity.java
	bin/AirFacebook.ane
integrated changes from emerginggames repo