Removed UsagePointBuilder and associated tests
Removed SubscriptionBuilder, AtomFactory, and FeedFactory and associated
tests.
Removed FeedBuilder and associated references.
Removed XMLMarshaller and associated references
Removed common.atom.* as dead code
Merge pull request #73 from jateeter/master

DeadCode Removal
Made RetailCustomer Inherit from IdentifiedObject
Merge pull request #74 from jateeter/master

Made RetailCustomer Inherit from IdentifiedObject
Merge branch 'master' of http://github.com/energyos/OpenESPI-Common-java

Conflicts:
	src/main/java/org/energyos/espi/common/service/impl/UsagePointServiceImpl.java