Implemented deleteEntity method: only tested in User entity
Created Entity UserRoles
Created UserDAO
Added Test Case for User and UserRoles
Users.jsp now list users and they are selectable
Implemented Simple listing of users
Merge branch 'master' into Spring

Conflicts:
	src/main/java/org/amc/dao/MaterialDAO.java
	src/main/java/org/amc/dao/MouldingProcessDAO.java
	src/main/java/org/amc/dao/PartDAO.java
Added Atom feed from github to login page
Missing UserRoles in <Class> definition in persistence.xml
Moved github atom feed from Login.jsp -> index.html
Moved CSS definitions on the TABLE tag to specific classes.
Hard coded in Security roles into StartupShutdownListener.java: Hopefully a better way can be found later
User.jsp displays User's roles
Create a DAO for UserRoles to retrieve from the database the User's current roles
Added orphanRemoval to instance variable roles to remove orphaned database entities when roles are removed from the collection
forgot to add provate access to instance variables
Added toString method to UserRoles class
Can edit and add and delete roles from User in User.jsp
made password optional, null values are allowed
Users can now be added by UserServlet
made password optional, null values are allowed
Fixed bug: Crash when no roles where selected in User.jsp