HORNETQ-1128 Initial work to generate reference from jms-schema:
- annotated both schemas (hq and hq-jms) to ease distinction from within XSLT
- adapted XSLT to also transform jms-schema
- added some documentation annotation to jms-schema
clean up
Minor fixes to the user manual
Merge pull request #982 from FranciscoBorges/documentation

Add some annotation to hornetq-jms-xsd + minor user manual fixes