New project environment + database + Maven + (almost) working persistence ** See details **

- Created a new, more flexible project environment, with packages and
general structure constructed to allow easy testing and scalability.

- Implemented database persistence for User entities, with a couple of
bugs standing in the way. Items should follow soon.

- Included Maven directory for automatic librairies import and config.

*** IMPORTANT *** For the project to work, you have to put the Maven
fodler directly under your C:/ drive and make sure that your eclipse
config has a classpath variable called "M2_REPO" pointing to the
C:/Maven/repo folder (just go to Window->Preferences in Eclipse, and
then Java->Build Path->Classpath Variables to check).
You should ideally also set up Maven itself using this guide
(http://www.mkyong.com/maven/how-to-install-maven-in-windows/) or the
Linux one

- Added a MySQL database model. Just launch a MySQL server and load up
the schema to have the appropriate tables.