[#ARCH-48] modify pom
[#LIB-194] Modified Javascript API to include name
[#DCMEEREQ-6] Added beans xml to datamngmt
Small fix on beans.xml
[#DCMEEREQ-6 Implemented perminant DeleteService and purge]

Service enables delete with Http DELETE method and GET method.
Support purge of empty studies and series.
keeps track of number of instances changes
deletes files from the archive data directory on purge of instances.
[#LIB-195] Refactor SAXWriter