Preparing release 0.2.11

git-svn-id: https://svn.stsci.edu/svn/ssb/stsci_python/d2to1/trunk@26508 fe389314-cf27-0410-b35b-8c050e845b92
Back to development: 0.2.12

git-svn-id: https://svn.stsci.edu/svn/ssb/stsci_python/d2to1/trunk@26510 fe389314-cf27-0410-b35b-8c050e845b92