fix releaseNumber issues
fix ReleaseNumber test build issue
add gui functions for adding subrequiremetns
fix null iteration date issue
added controller, observer, and entity manager, will not work until panel is implemented
ignore bad core test
Lots of files changed, added view iteration tab and panel for future work
remove files that will never be used
Started gui for creating and editing release numbers
Merge branch 'dev' into dev-feature-releasenumbergui
Added toolbar view for working with release numbers.
Merge branch 'dev-feature-releasenumberdb' into dev-feature-releasenumbergui
Integrated db stuff with gui.
Finished implemented backend for release numbers.
Added entity manager to core's map. Fixed an issue with toJSON method in ReleaseNumber. Got most of the code written for release numbers, but I'm getting a JSON formatting error, and haven't figured out the cause yet.