Added contact list to the sendMail activity layout.
New messages can now be written and sent to a selected contact.
Aligned receiver left and sender right in conversations.
Got the checked and then unchecked recipients to not crash the app, and to display an error if no recipient is selected.
Delete the database at logout.
Added duplicate username checking.
Handle the removal of password from server return.
Database edit.
Added editText for conversations. Not tested yet.
Fixed the layout of the conversationView, and added the button listener.
Merge branch 'feature/MessageEnhancements' into develop

Conflicts:
	src/com/seniordesign/team1/aaapp2/ContactDbHelper.java
	src/com/seniordesign/team1/aaapp2/SectionsPagerAdapter.java