[#95] Display Dialog with Saved Surveys

* Reuse CursorAdapter (move it to its own file)
* Display DialogFragment to select saved response, or create new
* Remove CURRENT status concept for a survey instance
[#95] Check for saved responses in RecordActivity

* Don't show the dialog if not required
* Programmatically create the ListView (no need for layout file)
* Remove unnecessary call to bindView() in  CursorAdapter
[#95] Create the SurveyInstance upfront

* Always provide a survey instance to SurveyViewActivity
* Add RecordId Tag to responses list rows
[#95] Externalize Strings