Add Download section and some cleanup
Add Download section and some cleanup

TukekeSoft/CocosSharp,haithemaraissia/CocosSharp,netonjm/CocosSharp,netonjm/CocosSharp,mono/cocos2d-xna,mono/cocos2d-xna,mono/CocosSharp,MSylvia/CocosSharp,zmaruo/CocosSharp,hig-ag/CocosSharp,mono/CocosSharp,haithemaraissia/CocosSharp,TukekeSoft/CocosSharp,MSylvia/CocosSharp,zmaruo/CocosSharp,hig-ag/CocosSharp