Add lua binding for Facebook
Make HelloPlugin support Facebook and add TestFacebookUser test case
Add FacebookShare test case
Merge branch 'develop' of https://github.com/cocos2d-x/plugin-x into v3_facebook1

Conflicts:
	luabindings/auto/api/ProtocolAds.lua
	luabindings/auto/api/ProtocolShare.lua
	luabindings/auto/api/ProtocolSocial.lua
	luabindings/auto/api/ProtocolUser.lua
	luabindings/auto/lua_cocos2dx_pluginx_auto.cpp
	luabindings/auto/lua_cocos2dx_pluginx_auto.hpp
	luabindings/manual/lua_pluginx_basic_conversions.h
	luabindings/manual/lua_pluginx_manual_callback.cpp
Update lua-bindings
Update android setting for Facebook test cases
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
Update HelloPlugin test cases and project setting.
Merge pull request #74 from samuele3hu/v3_facebook1

Add plugin-facebook, related test cases, and add lua bindings for FacebookAgent