Prepare release 2.8.5
Added tag 2.8.5 for changeset 604a04ca3bff
Increase version number
Clear origin field on copying lines

review2421002
issue3565
(transplanted from e4a9667679f856d23f74b6efb0c62c09cbe2f852)

--HG--
extra : transplant_source : %E4%A9fvy%F8V%D2%3Ft%B6%EF%B0%C6%2C%09%CB%E2%F8R
Fix typo in Period.write to check invoice sequence changes

It was introduced in changeset 90edc4984c69.
Patch from Jordi Esteve.

issue3567
review2461003
(transplanted from 77bd9c1bb110f5cb51771231d9912267f546b404)

--HG--
extra : transplant_source : w%BD%9C%1B%B1%10%F5%CBQw%121%D9%91%22g%F5F%B4%04