yt is a group effort.

Contributors:   
                Tom Abel (tabel@stanford.edu)
                David Collins (dcollins@physics.ucsd.edu)
                Brian Crosby (crosby.bd@gmail.com)
                Andrew Cunningham (ajcunn@gmail.com)
                Hilary Egan (hilaryye@gmail.com)
                John Forces (jforbes@ucolick.org)
                Nathan Goldbaum (goldbaum@ucolick.org)
                Markus Haider (markus.haider@uibk.ac.at)
                Cameron Hummels (chummels@gmail.com)
                Christian Karch (chiffre@posteo.de)
                Ji-hoon Kim (me@jihoonkim.org)
                Steffen Klemer (sklemer@phys.uni-goettingen.de)
                Kacper Kowalik (xarthisius.kk@gmail.com)
                Michael Kuhlen (mqk@astro.berkeley.edu)
                Eve Lee (elee@cita.utoronto.ca)
                Sam Leitner (sam.leitner@gmail.com)
                Yuan Li (yuan@astro.columbia.edu)
                Chris Malone (chris.m.malone@gmail.com)
                Josh Maloney (joshua.moloney@colorado.edu)
                Chris Moody (cemoody@ucsc.edu)
                Andrew Myers (atmyers@astro.berkeley.edu)
                Jill Naiman (jnaiman@ucolick.org)
                Kaylea Nelson (kaylea.nelson@yale.edu)
                Jeff Oishi (jsoishi@gmail.com)
                Jean-Claude Passy (jcpassy@uvic.ca)
                Mark Richardson (Mark.L.Richardson@asu.edu)
                Thomas Robitaille (thomas.robitaille@gmail.com)
                Anna Rosen (rosen@ucolick.org)
                Douglas Rudd (drudd@uchicago.edu)
                Anthony Scopatz (scopatz@gmail.com)
                Noel Scudder (noel.scudder@stonybrook.edu)
                Devin Silvia (devin.silvia@colorado.edu)
                Sam Skillman (samskillman@gmail.com)
                Stephen Skory (s@skory.us)
                Britton Smith (brittonsmith@gmail.com)
                Geoffrey So (gsiisg@gmail.com)
                Casey Stark (caseywstark@gmail.com)
                Elizabeth Tasker (tasker@astro1.sci.hokudai.ac.jp)
                Stephanie Tonnesen (stonnes@gmail.com)
                Matthew Turk (matthewturk@gmail.com)
                Rich Wagner (rwagner@physics.ucsd.edu)
                Andrew Wetzel (andrew.wetzel@yale.edu)
                John Wise (jwise@physics.gatech.edu)
                John ZuHone (jzuhone@gmail.com)

Several items included in the yt/extern directory were written by other
individuals and may bear their own license, including the progressbar module by
Nilton Volpato.  The PasteBin interface code (as well as the PasteBin itself)
was written by the Pocoo collective (pocoo.org).  
developed by Oliver Hahn.  

Thanks to everyone for all your contributions!
