Step4 of RESTFul Integraiton - atom+xml across the board and
re-adjustment of ROOT/XPath interfaces.
Made ThirdParty CORSFilter enabled (w/o dependency on common package)
corrected capitalization of: Content-Type, Authorization"
Added license comment to the file
removed test_usage.xml as it is in the common repository
put the fixtures/test_usage_data.xml back in as the unit tests don't use
common.
Merge pull request #33 from jateeter/master

Step4 of RESTful Implementation