fix for image viewer, replace backslashes (ty firefox)
Merge branch 'dev' into gui
Merge branch 'dev' into gui
Merge branch 'gui' of github.com:swryan/OpenMDAO-Framework into gui
Merge branch 'dev' into gui
fix image viewer to handle images in subdirectories, add to test
clean up image viewer test
add some logic to gui FileTreePane to keep folders open
queue updates to gui FileTreeFrame so messages are handled sequentially
skip view_csm test on Pangolin for now (FIXME)
Merge pull request #1435 from swryan/gui

gui - image viewer and file tree fixes/updates