polish pom.xml
only persistence.xml is needed (and make it look nice)
we don't check for mac addresses (unfortunately), so no need for this
entity
move files around (and dos->unix)
move them around for DDD
better looking style
example->citm
myapp->citm

and don't even try to come up with singeltons that way, it never works
out
System.out is NOT the way to debug...
comments are not supposed to lie
this makes my life easier, accept!
return -1 by default
nicer format