issue #2050: unsigned int to int
issue #2050: delete max/minGID, fix firstGID bug
issue #2050: use static_cast
closed #2050: Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into bug2050_tilemap_firstgid_bug

Conflicts:
	cocos/2d/CCTMXLayer.cpp
closed #2050: fix js glue code.
closed #2050: add tile map xml format test and fix tile property bug.
closed #2050: Change tile map test to c++11, change XMLFormatTest name and subtile
Merge branch 'develop' of git://github.com/cocos2d/cocos2d-x into bug2050_tilemap_firstgid_bug

Conflicts:
	cocos/2d/CCTMXXMLParser.cpp
	cocos/2d/CCTMXXMLParser.h
closed #2050:  move autorelease to CLN
issue #2050: commit resources
Merge pull request #4596 from boyu0/bug2050_tilemap_firstgid_bug

closed #2050: fix tilemap firstgid bug