Add .pyd to the list of compiled files to ignore

git-svn-id: http://svn6.assembla.com/svn/pyfits/trunk@2126 ed100bfc-0583-0410-97f2-c26b58777a21
Added better instructions on SVN sync for dealing with tags/branches.  The previous instructions led to trying to sync *all* branches in the SVN history which is overkill.

git-svn-id: http://svn6.assembla.com/svn/pyfits/trunk@2127 ed100bfc-0583-0410-97f2-c26b58777a21