BIG COMMIT
Lots of stuff added:
Basic user search implemented and made to look nice
- Send Message works, although sendmessage.jsp still needs to be fully
implemented
- Add Friend does not yet work
- The autogenerated link to each user's profile may need to be changed
depending on how Gino implemented profiles

Other things added:
- I've added a class that will autogenerate thumbnail views of user
profiles. If you ever want to create one or more thumbnail views, such
as the view in the user search results, use this class
- I made and uploaded a default picture for users who do not have a
picture. Code should be added to the createAccount page to auto-add this
link for anyone who doesn't submit a valid picture
- Added an "executeSimultaneousQuery" method to DatabaseConnection. If
you ever try to create two ResultSets, the second one will disable the
first one. To have simultaneous ResultSets, use executeQuery() for the
first, and then executeSimultaneousQuery() for any additional
- I added a single line of code to CreateMessageServlet to allow it to
better handle POST requests