Merge pull request #1403 from kmarsteller/dev

fixed install issue and changed EC2 test hosts.  Also added a GEMParametricGeometry test that is skipped if pygem_diamond is not installed.
Update README.txt
Update README.txt
removing py2.6 from release builder.
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into dev
slightly new config hosts