Add new plotting tools and do some code cleanup#4

Merged

dcolombo merged 9 commits intoAstroua:masterfrom

keflavich:plotting

Mar 30, 2015

Commits on Oct 20, 2014

add both my changes and Dario's
keflavich
committed

Commits on Nov 14, 2014

Merge pull request #1 from Astroua/master
keflavich
committed

Commits on Mar 30, 2015