Created a context.xml file so I can connect to a MySQL Database server.
Created a DatabaseHelper class, that should assist with various database
activities (Getting a DataSource, etc...). Created a TweetServlet that
will act as the /messages endpoint.
Created a framework for accessing and querying the database. For now
this is in the TweetModel but I think I will refactor it. Also added a
doGet stub to the TweetServlet.
The application is now able to connect to a MySQL server and use it. I
run the MySQL server inside a Vagrant VM instance so I added a
Vagrantfile to the project.