Update GLES version notes in README.mdown

Also, remove trailing whitespace and improve formatting.
Merge pull request #2125 from sbc100/fix_readme

Update GLES version notes in README.mdown
fixed #1808: Updated the submodule of cxx-generator and fixed some compilation errors after that.
fixed #1808: Adding config section 'script_control_cpp' and set it to 'no'.
Merge pull request #2129 from dumganhar/master

fixed #1808: Updated the submodule of cxx-generator and fixed some compilation errors after that.
cocos2dxmatoMac-mini : updating submodule reference to latest autogenerated bindings
Merge pull request #2130 from CocosRobot/updategeneratedsubmodule_1362895391

cocos2dxmatoMac-mini : updating submodule reference to latest autogenerated bindings