Merge branch 'bench' of github.com:Kenneth-T-Moore/OpenMDAO-Framework into bench
working
speed improvement for get_sources
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into bench
Update variables.rst

Added Instance example to docs.
Merge pull request #1591 from Kenneth-T-Moore/bench

Performance Improvements 3
Merge pull request #1589 from crobinsonut/dev

Update variables.rst
add ringtail instance to testhosts
update ringtail image (removed authorized kets from image)
Merge pull request #1592 from swryan/gui

Gui
Update .gitignore
Fix typo in File variable example.
Merge pull request #1593 from setowns1/bug

Fix typo in File variable example.