Increase version number
Restore es_AR translation
(transplanted from f62f77677497647208a3068cb1bcb0b36c0bd66b)

--HG--
extra : transplant_source : %F6/wgt%97dr%08%A3%06%8C%B1%BC%B0%B3l%0B%D6k
Prepare release 2.4.1
Added tag 2.4.1 for changeset 8a2e2ff8261f
Increase version number
Increase version number
Increase version number
Increase version number
null merge from 2.4
null merge from 2.6
null merge from 2.8
null merge from 3.0
Improve setup.py to allow dev publication

issue3436
issue1891
review2441002
Be safer with the on_change using One2Many values

review4261002