Added support for contact photo uri (content://com.android.contacts/)
Removed required defaultResId check, sometimes i need a null image without a default empty image.
Fixed isFromFileSystem, if the Uri comes without a scheme and starts with /, it assumes it is a file uri scheme and returns true
Updated with latest notes from @ataulm
Merged with develop branch
Merges novoda:imageloader:develop
Applies novoda checkstyles
Applies checkstyles

- I must have committed it before Android Studio could save everything
Merge pull request #137 from novoda/contact_photos_uri

Contact photos uri