Fixed #5533: Add SpriteFrame's constructor and make constructor & init functions protected
Merge pull request #7023 from samuele3hu/v3_lua_ui_fix

Fix the crash of cocostudio ui lua test cases and add some deprecated functions of Widget
Fixed #5533: Make SpriteFrame's constructor and init functions public temporarily to avoid issues
Fixed #5533: Fix usage of new SpriteFrame in engine
Merge pull request #7024 from pandamicro/SpriteFrame_Ctor

Issue #5533: Add SpriteFrame's constructor
[ci skip]
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3_lua_ui_fix