Login and Registration Screen Issues Completed

- Fixed problems with res/menu/registration.xml and res/menu/login.xml
causing them to throw an error in the IDE
- Removed MessageCheck.java and MessageInformation.java
- Redesigned the Login screen (activity_login.xml) to be more inline
with what was discussed in the team meeting
- Redesigned the Registration screen (activity_registration.xml) to be
more inline with what was discussed in the team meeting
- Added header image placeholder (300x70) for login, register, and
landing screen
- Titles for activity_login.xml and activity_registration.xml are now
more user-friendly
- string.xml variable names now follows the format
["screenName_information_type"]

Issues Completed:
- Client / Create the Login Screen #12
- Client / Create the Registration Screen #13