- can now pass a pyfits image instance instead of a filename
- can now pass a pyfits image instance instead of a filename

git-svn-id: 83a0274dba4329d458142e4079227af35a786d9d@86 2f3f69f2-b874-4715-96d5-35985bcb53a6

allisony/aplpy,mwcraig/aplpy