Tentative abstract (work in progress)

I started working on the 1-page abstract for the MLOSS workshop at NIPS. 

It reuses @jakevdp abstract and adds some more content from the API paper.

This is still a work in progress, but I am already merging this to make things move on. I'll be working on this tomorrow as well and hope to have a good first draft by then.

CC: @GaelVaroquaux