Updated action bar so that versions of Android 2.1 and above can be used. Formatted GUI for main activity - changed button colour, centered edit text with padding, and changed background colour for edit text. Added comments. Created AddAccountActivity.
Added login stuff
Added code to generate key hash
Merge pull request #11 from g3-ks/Keval

Updated action bar so that versions of Android 2.1 and above can be used...