Merge pull request #2 from setowns1/bug

Update to new VarTree syntax
Merge pull request #3 from setowns1/bug

Update for new File variable API.
added _static to docs and __init__.py to test to fix warnings.
Merge pull request #4 from setowns1/bug

Update for Traits 4.3.0
Merge pull request #5 from kmarsteller/master

added _static to docs and __init__.py to test to fix warnings.
Merge pull request #6 from setowns1/bug

Fix VariableTree problem that came in with OpenMDAO 0.9.0
Merge pull request #7 from setowns1/bug

Make compatibkle with 0.9.2
Fix and test broken category support