tilemap supports XML layer format
a potential bug in Layer.

https://github.com/cocos2d/cocos2d-x/issues/2948
Update CCLayer.cpp

change "_accelerometerEnabled = false"
to "setAccelerometerEnabled(false)"
in method init().
a potential bug in ScrollView

check _touches in setTouchEnabled
the latest develop code merged
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into tilemap_plain_xml_format_support
added _currentTileIndex member to TMXLayerInfo
removed extra _currentTileIndex
Fixed broken links and wrong encoding in the doc.

Fixed Obj-C names when referening functions.
Changed some GB2312 encoded characters to UTF-8.
Changed two 'XXX class for cocos2d for iphone'.
Documentation & Cocos2d-x C++ Style
fixed stroke font color with channel color values other than 255
closed #2522: Let Image::initWithImageData() support the packed data.
closed #2522: Fix some coding style.
closed #2522: Fix compile error.
issue #2522: fix some wrong indent.
Merge branch 'tilemap_plain_xml_format_support' of https://github.com/simpliplant/cocos2d-x into tilemap_plain_xml_format_support and add extra control to parse the tmx file for load the xml format tiles.
issue #2533:add ATITC compressed texture support

soft decode test in Win32, ios, Mac. device decode test in HTC G14
Adreno 220 GPU.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into Atitc_decode
Merge pull request #3411 from maciekczwa/master

fixed stroke font color with channel color values other than 255