Adding support for window.parent

In a browser, window.parent always === window at the topmost window. In
the case of Ejecta, since there will never be subwindows or frames, setting
window.parent to window is good enough.

For more information:

https://developer.mozilla.org/en-US/docs/Web/API/window.parent
Merge pull request #192 from amadeus/fix-window-top

Adding support for window.parent
Add method to EJTexture to get back a UIImage from the texture
Whitespace cleanup
fixed the bug of canPlayType() returns value when unsupport is undefined
fixed the bug of Video.canPlayType() returns value when unsupport is undefined
Upgraded to XCode 5.0
Fix #186  - STENCIL_INDEX is not available on iOS7
Hide Status Bar on iOS7
Merge branch 'master' of github.com:phoboslab/Ejecta
Merge pull request #205 from GGGame/master

fixed the bug of canPlayType() method returns the value is undefined when pass the unsupport type
Merge pull request #196 from paperlesspost/texture_to_uiimage

EJTexture to UIImage
Whitespace, cosmetics
Add PVRTC support for Canvas2D; close #200
Added window.performance.now()
Provide timestamp to requestAnimationFrameCallback; close #199
Added createFunctionWithBlock; see #197
Allow returning NULL in BlockFunction
Lazily create touch objects; up limit to 16; fix #189
Cosmetics