try to find the right pull request automagically

(getting a touch ugly atm, but will clean up later)
add some notes/comments
comment media types dont seem to work, handle args/noargs
more attempts at guessing the right repo/pr

This is where I notice my strange git setup hurts
more than it helps, but alas.
bunch of messing with remote name that is unneeded
update README
Get this mostly working

Assume we have a merge/tracking/upstream url set
for a branch. Handle cases of multiple repos/pr's
a little better.
Merge pull request #1 from alikins/devel

This is a comment on the merge.