Fix to call debugging log methods only in DEBUG build.

Also copied changed files to Add-To-Your-Own-Project folder.
Add FLURRY preprocessor as a proper usage in coding using Flurry with app. Modifed flurryLogEvent() to accept variable argument. Add macro header. Update README, and files changed to Add-To-Your-Own-Project folder.

- Macro header contains one event logging method that is frequently used.
- flurryLogEvent() method is modified to accept variable argument. Make it more convenient to use.
- *Remeber to #define FLURRY, or define it in per project-based ie. XCode's in Build Setting->Apple LLVM 6.0 - Preprocessor, then add FLURRY in target.
Fix a crash bug of cocos2d's swap buffer.

Fixed it via adding to stop/start animation properly when application did enter background, and will enter foreground.
Merge pull request #15 from haxpor/master

Fixed things, Added macro for convenience, Changed for preprocessor FLURRY