Merge pull request #1845 from dumganhar/gles20

Updated Xcode template.
Also, added restriction marco CC_TARGET_PLATFORM == CC_PLATFORM_MAC for CCEditBox of MAC port.
This can avoid compilation errors if other platforms include these files.
issue #1650: Adding detailed doxgen comments for CCDictionary.
issue #1650: Made the destructor of CCDictElement as public method.
issue #1650: Inline function needs to be implemented in header file on Android platform.
Merge pull request #1846 from dumganhar/iss1650-doxgen-ccdictionary

issue #1650: Adding detailed doxgen comments for CCDictionary.
fixed #1468: Exported CCPoint, CCSize and CCRect.