doi isn't showing up as url. adding as doi entry.
Merge branch 'source' of github.com:cyclus/cyclus.github.com into source
adds DOI creation to CEP 3
updates the update date of CEP 3
adds cep 4, with links
Merge branch 'source' of github.com:cyclus/cyclus.github.com into source
Merge branch 'source' of github.com:katyhuff/cyclus.github.com into source
adds cep 4 to the main list
creates links to cep 4
spellcheck
version number correction
fixed cep3 created line, changed last-modified line, as I had meant to do. whoops. good catch @scopatz!
Merge pull request #96 from katyhuff/source

CEP 4 - Attribution of Code Products in the Cyclus Ecosystem