Recommendation Tracker Code

Merged changes from the trunk into the xhtml branch

Set tooltip of mixed content text areas to preview the marked up contents.

Added XHTML support for elements which have such support in XCCDF.
For feature requests:
2844623 - support XHTML on export,
2844622 - support XHTML on import
2019813 - support XHTML in descriptions

+ added another getItem(...) method that takes a list as input

+ More changes to the AbsHelper
+ Started work on integrating the AbsHelper into the ReferenceHelper and the FileTypeHelper
+ Removed Internal Checks from schema
+ Consolidated reference types under one common "References" parent
- didn't touch the java code to use this yet

+ Fixed some of the "getReferenced" type methods in AbsHelper
+ Fully integrated new CommentHelper into comment panels and table models

+ Made more changes to AbsHelper (added methods)
+ Fully integrated it into the Comment panels (untested)

+ Completed work on AbsHelper. (Needs Testing)
+ Integrated AbsHelper with CommentHelper
+ Working on propagating CommentHelper changes around
+ Started a HelperFactory class

+ Starting to rework the helpers to support AbsHelper
- this will allow use of a factory and calling methods like addNew___ without knowing what type I am working with.

+ Fleshed out registration methods (add____())
+ changed code to support different parent types than just Recommendations
- hopefully this will be tied into mjaor types: groups, profiles, and compliance checks