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.
Merge pull request #1377 from setowns1/bug

Report on retrying install if something failed, pin setuptools version.
Merge branch 'dev' of https://github.com/OpenMDAO/OpenMDAO-Framework into hifi
more cleanup