We should use Fragments instead of Activities for the Note-List, View, Edit Note, Preferences,...

This is important for switching to the new dialogues, keeping the actionbar always visible, further candy like swipe gestures, a much cleaner Tomdroid.java, as all the code for the table split view is "gone" the list is a separate fragment, etc.
A very necessary step to improve our code basis!

http://developer.android.com/guide/components/fragments.html
http://developer.android.com/reference/android/app/Fragment.html
http://android-developers.blogspot.co.at/2011/03/fragments-for-all.html
http://developer.android.com/tools/extras/support-library.html

We need to clean up Tomdroid.java during this task!