Add some robotics papers.
Add Saint Louis.
Merge pull request #37 from papers-we-love-st-louis/master

Add Saint Louis to the list of organizations.
Merge pull request #36 from mfollett/master

Add some robotics papers.
Added Karp's reducibility_among_combinatorial_problems
Merge branch 'master' of https://github.com/z0a/papers-we-love