Update the sphinx conf.py with the new dev version post release

git-svn-id: http://svn6.assembla.com/svn/pyfits/trunk@2158 ed100bfc-0583-0410-97f2-c26b58777a21
Update to the build instructions to require a fresh clone of the repository--this side-steps the issues with git-svn for now.  Also updated to mention the website update step.

git-svn-id: http://svn6.assembla.com/svn/pyfits/trunk@2159 ed100bfc-0583-0410-97f2-c26b58777a21
A few more notes about the website updates.

git-svn-id: http://svn6.assembla.com/svn/pyfits/trunk@2160 ed100bfc-0583-0410-97f2-c26b58777a21
Update the summary to be on one line--PyPI will strip the newlines and replace them with blanks (need to update d2to1 to do this as well, but be a bit nicer and replace newlines with spaces)

git-svn-id: http://svn6.assembla.com/svn/pyfits/trunk@2161 ed100bfc-0583-0410-97f2-c26b58777a21