Adds ref memory tracker to easily find out memory leak for instance of Ref or its subclasses
Remove a comment in CCRef.cpp
Disables memory tracker by default
Updates indention in CCRef.h
Fixes wrong indention and whitespace cleanup
Include <algorithm> for std::find
Merge pull request #6724 from CocosRobot/update_lua_bindings_1400032916

[AUTO]: updating luabinding automatically
[ci skip], modify v3!=v2 about config.json.
Merge pull request #6727 from shujunqiao/pull-build-trigger

[ci skip], modify v3!=v2 about config.json.
trackRef and untrackRef are static function now.
Merge pull request #6725 from dumganhar/ref-tracker

Adds ref memory tracker to easily find out memory leak for instance of Ref or its subclasses