Use support fragment

Please, use android.support.v4.app.Fragment instead of SherlockFragment.

Sherlock fragment is inherited from android.support.v4.app.Fragment and it makes not mush sense to use it. Also  it makes impossible to use the lib for those who don't use ActionBarSherlock in custom camera apps. 

ActionBarSherlock is heavy and is not needed anymore as of new AppCompat version of ActionBar is released.

Here is a ink to SherlockFragment for quick look:
https://github.com/JakeWharton/ActionBarSherlock/blob/master/actionbarsherlock/src/com/actionbarsherlock/app/SherlockFragment.java

Thanks!