Save functionality on add page

Files show up in browser, main activity button name changes to first txt
file in folder.

TODO: add new buttons on main page after a save is successful
Buttons are created dynamically, but the path to go to the details is not correct.
Delete useless stuff
Main page is populated with buttons now...
All app functionality (Except for crash when going back from edit)
new background image
Added appendFile helper method
Merge conflicts fix
Merge pull request #1 from cxpson/addSave

Add save