Add documentation summary to CCLabel constructors
Add documentation summary to CCLabel constructors

zmaruo/CocosSharp,haithemaraissia/CocosSharp,zmaruo/CocosSharp,mono/CocosSharp,MSylvia/CocosSharp,mono/CocosSharp,TukekeSoft/CocosSharp,MSylvia/CocosSharp,haithemaraissia/CocosSharp,TukekeSoft/CocosSharp