Merge pull request yt-project#2961 from munkm/bugfix-release-361

Bump versions for bugfix release

Merge pull request yt-project#2613 from cavestruz/issue/2608/artio-wi…

…th-ytep-0003-conv

Modified artio frontend fields to ytep 0003 conv: Issue/2608/artio

update version numbers for 3.6.0

updating version numbers

update version numbers for 3.5.0

update verison numbers for yt-3.4.1

merge stable with master

Updating version numbers

--HG--
branch : stable

updating version numbers for 3.3.4

--HG--
branch : stable

Updating version numbers and tagging for yt 3.3.3 release.

--HG--
branch : stable