Adding checkbox for saving to database

Also adding dialogue message at end of analysis session displaying
results and prompting user to save to database
Merge branch 'master' of https://github.com/celloman/GREPapp
Added dialog on end of analysis session

Contains number of tweets processed, session duration and average
sentiment… offers user option of saving or not saving to db (saving is
default)
Note: Gauge thread keeps running in the background… we will have to
figure that out...
Fixing conflicts for merge