Mark the "resources"-folder as resouce folder
Remove the navigation logic from the MainWindow

The NavigationHandler should do this job.
Change navigation from 'mainWindow' to 'navigationHandler' in overview
Make the NavigationHandler singleton

User and MainWindow can now, also be set only once.
Minor: Remove default file template comentar
Create getter and constructor param for Section in Entry
Change the JPA mode to update
Remove the workspace.xml
Minor: move to persistence.xml to "src/main/resources/META-INF"
Create a log4j configuration
Minor: Rename some methodes in the Navigation Handler
Set the content of the MainWindow from outside.

Use the NavigationHandler, to set it to the correct values.
Merge branch 'navigation' into 'logic'

The basic navigation logic is working.
Create a loginHandler
FIX: Set the created DatabaseConnection to the instance

Otherwise it was created every time "getInstance()" was called.
Add a namedQuery to find Users by there Usernames
Add the login logic to the login handler

The LoginHandler requests the user with the corrisponding name from the
database and checks if the password is correct.
If everything is fine it moves on to the overview.
Otherwise it throws a LoginException.
Use the new login logic in the LoginPanel
Merge branch 'login' into 'logic'

The login functionallty itself works fine, but there are some troubles
with JPA which have to be fixed before it really works.
(And ofcourse there needs to be a user in the database)
Update the version of the MySQL connector