Started converting QueryActivity to a fragment per #15
Working version with fragments.
Not actually working yet.
Actually, wasn't working before - those were old, cached classes. Now layout is working as a fragment, but not (yet) app logic. per #16
Removed onClick attributes in query layout (they need an activity, not a fragment) per #16
restored options menu for query fragment
Re-enabled more of the app logic in  QueryFragment.
Start setting up more of the UI.
UI and app logic are working now, but not saving/restoring state yet.
All previous QueryActivity functionality now working in QueryFragment.

Fixes #16