yt is a group effort.

Contributors:   
                Tom Abel (tabel@stanford.edu)
                Gabriel Altay (gabriel.altay@gmail.com)
                Kenza Arraki (karraki@gmail.com)
                Elliott Biondo (biondo@wisc.edu)
                Alex Bogert (fbogert@ucsc.edu)
                Pengfei Chen (madcpf@gmail.com)
                David Collins (dcollins4096@gmail.com)
                Brian Crosby (crosby.bd@gmail.com)
                Andrew Cunningham (ajcunn@gmail.com)
                Miguel de Val-Borro (miguel.deval@gmail.com)
                Hilary Egan (hilaryye@gmail.com)
                John Forces (jforbes@ucolick.org)
                Sam Geen (samgeen@gmail.com)
                Nathan Goldbaum (goldbaum@ucolick.org)
                Markus Haider (markus.haider@uibk.ac.at)
                Eric Hallman (hallman13@gmail.com)
                Cameron Hummels (chummels@gmail.com)
                Christian Karch (chiffre@posteo.de)
                Ben W. Keller (kellerbw@mcmaster.ca)
                Ji-hoon Kim (me@jihoonkim.org)
                Steffen Klemer (sklemer@phys.uni-goettingen.de)
                Kacper Kowalik (xarthisius.kk@gmail.com)
                Mark Krumholz (mkrumhol@ucsc.edu)
                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)
                Stuart Mumford (stuart@mumford.me.uk)
                Andrew Myers (atmyers@astro.berkeley.edu)
                Jill Naiman (jnaiman@ucolick.org)
                Desika Narayanan (dnarayan@haverford.edu)
                Kaylea Nelson (kaylea.nelson@yale.edu)
                Jeff Oishi (jsoishi@gmail.com)
                Brian O'Shea (bwoshea@gmail.com)
                Jean-Claude Passy (jcpassy@uvic.ca)
                John Regan (john.regan@helsinki.fi)
                Sherwood Richers (srichers@tapir.caltech.edu)
                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)
                Pat Shriwise (shriwise@wisc.edu)
                Devin Silvia (devin.silvia@gmail.com)
                Sam Skillman (samskillman@gmail.com)
                Stephen Skory (s@skory.us)
                Aaron Smith (asmith@astro.as.utexas.edu)
                Britton Smith (brittonsmith@gmail.com)
                Geoffrey So (gsiisg@gmail.com)
                Casey Stark (caseywstark@gmail.com)
                Antoine Strugarek (strugarek@astro.umontreal.ca)
                Ji Suoqing (jisuoqing@gmail.com)
                Elizabeth Tasker (tasker@astro1.sci.hokudai.ac.jp)
                Benjamin Thompson (bthompson2090@gmail.com)
                Stephanie Tonnesen (stonnes@gmail.com)
                Matthew Turk (matthewturk@gmail.com)
                Rich Wagner (rwagner@physics.ucsd.edu)
                Michael S. Warren (mswarren@gmail.com)
                Andrew Wetzel (andrew.wetzel@yale.edu)
                John Wise (jwise@physics.gatech.edu)
                Michael Zingale (michael.zingale@stonybrook.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!
