@fix StageElement clearAction
@add sprite offset setting support
Merge branch 'v1.2' of github.com:NosicLin/faeris into v1.2

Conflicts:
	lib/libextends/libluaexport/src/luaexport/FsLibFaerisExport.cc
	lib/libextends/libluaexport/src/luaexport/FsLibLuaScript.cc
	lib/libextends/libluaexport/src/luaexport/FsLibSpineSprite.cc