Document main datatypes
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into bug
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into bug
Drop item in main.datatypes/README.txt
Merge pull request #1376 from setowns1/bug

Restored documentation of main/datatypes classes
Report on retrying install if something failed, pin setuptools version.
vartree fix
tweaking vartree test
Merge pull request #1377 from setowns1/bug

Report on retrying install if something failed, pin setuptools version.
more tweaks to VariableTree stuff
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into vtree
Merge pull request #1378 from swryan/gui

gui - disable DELETE key in dataflow diagram
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into vtree
Edited geometry tutorial again.
Support installing in a virtualenv, fix mingw install check.
Merge pull request #1379 from pziegfeld/redo_geom_edits

Edited geometry tutorial (redo plus additional text from JG).
removed a temporary 'pass' statement
Let users delete multiple files from the file tree
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into dev
Windows fix for installing in activated virtualenv.