Added the foundation for chrome.fileSystem support.
Added more file system tests.
Removed an unnecessary `quality` picture option.
Removed an unnecessary file copy command.
Added chrome.fileSystem.getDisplayPath.

This implementation is basic and may need to change.
Also added a simple test.
Added chrome.fileSystem writable entry methods.

These are shell implementations; isWritableEntry returns false and getWritableEntry returns null.
Also added simple tests.
Added the foundation for chrome.fileSystem support.
Added more file system tests.
Removed an unnecessary `quality` picture option.
Removed an unnecessary file copy command.
Added chrome.fileSystem.getDisplayPath.

This implementation is basic and may need to change.
Also added a simple test.
Added chrome.fileSystem writable entry methods.

These are shell implementations; isWritableEntry returns false and getWritableEntry returns null.
Also added simple tests.
Merge branch 'file-system' of github.com:MobileChromeApps/chrome-cordova into file-system

Conflicts:
	spec/background.js
Merge pull request #5 from MobileChromeApps/file-system

chrome.fileSystem foundational stuff.