End of workweek commit.  Basic stuff has been added and an interface for
the Service classes has been created.  It needs to be decided if this
interface is a good design choice or if it makes more sense to make it
an abstract class.  One thing that I am not happy about at all is the
lack of a protected or private EntityManager member with the appropriate
getter/setter methods.  I do not like this design much and will most
likely change it in a later version.  

One thing that needs to be fixed in this version is the relationships
between the entities.  Account for example has a defined one to one
relationship with banks.  This is inaccurate and must be changed.