Remove Islands Tests.ipynb, we didn't need it. Remove temporary
notebooks after running tests - note that this is difficult to test
under Windows, so I am guessing that this is the right thing to do.
Get ein:junk-new working again under IPython 2.x.
Some non-related work on fixing `ein:pytools-export-buffer`. Not quite
there yet, but I have an idea of what is going on.