new vartree tests
small test update
Merge branch 'geom_fix' of https://github.com/JustinSGray/OpenMDAO-Framework into vtree_missing_deriv
fixed justin's bugs
fixed vtree issue
spelling error
Merge pull request #1603 from naylor-b/vtree_missing_deriv

fixed issue with missing derivatives that are subvars of vtrees
Merge branch 'dev' of https://github.com/OpenMDAO/OpenMDAO-Framework into bench