v0.1, 2014-07-10 -- Initial release
v0.4, 2016-01-17 -- Near full release
v0.5, 2016-04-03 -- Added tags, fully generalized to lowest crystal symmetry
v0.9, 2016-05-11 -- First official public release
v0.9.1, 2016-06-09 -- Added supercells
v1.0, 2016-06-12 -- Added automator
v1.1, 2016-06-17 -- Roundoff error correction, automator updates
v1.2, 2016-07-10 -- Roundoff error + non-zero bias, vacancy probability bug fix, Fe-C notebook
v1.2.1, 2016-08-03 -- Additional notebooks added for vacancy-mediated diffuser
v1.2.2, 2017-04-04 -- New internal friction calculator for interstitial diffuser