Merge pull request #30 from huangshiwu/ludum-dare

modify mapLayer member name
Check the position index when getting the block.
Merge branch 'ludum-dare' of github.com:minggo/cocos2d-x into ludum-dare
show and hide blocks when 2 seconds hit
Merge branch 'ludum-dare' of github.com:minggo/cocos2d-x into ludum-dare
Merge pull request #31 from natural-law/ludum-dare

Check the position index when getting the block.
Add logic to show a block forever.
Merge branch 'ludum-dare' of github.com:minggo/cocos2d-x into ludum-dare
Add fade out effect.
Merge pull request #32 from natural-law/ludum-dare

Add logic to show a block forever.
add countdown
Merge branch 'ludum-dare' of github.com:minggo/cocos2d-x into ludum-dare

Conflicts:
	tests/cpp-empty-test/Classes/HelloWorldScene.cpp
disable touch when countdown