Update uifileset to use IGVCommandBarTest instead of CommandBarTest
Add ability to build native MacOS app using appbundler.

Note that it only works when full jar (build-all) is created, haven't resolved dependencies just yet

The appropriate build command is:
ant -Dinclude.libs="true" bundle
Improve support for loading FeatureSources to/from sessions

Somewhat hacky, but this solution should properly save and restore any FeatureSource which properly implements JAXB
Move SequenceMatchXXX classes to their own package