Increase version number
Missing CHANGELOG
(transplanted from 1d00e25d6538282be0fe002cb36b8613df60f395)

--HG--
extra : transplant_source : %1D%00%E2%5De8%28%2B%E0%FE%00%2C%B3k%86%13%DF%60%F3%95
Prepare release 3.0.1
Added tag 3.0.1 for changeset 8c01655a755e
Increase version number
null merge from 3.0
Improve setup.py to allow dev publication

issue3436
issue1891
review2441002