added test for vartree array
some docs
docs
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into docs
docs ready
Merge pull request #1554 from Kenneth-T-Moore/docs

Docs for Implicit Comps and for Derivative settings
Array variable support for 'required'.
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into bug
Merge pull request #1555 from setowns1/bug

Array variable support for 'required'
Merge branch 'dev' of https://github.com/OpenMDAO/OpenMDAO-Framework into dev
added test for fepoint