Merge branch 'develop'

Merge branch 'master' of github.com:genouest/biomaj

update changes

add info for database upgrades

Merge branch 'develop'

include README.md in package, closes genouest#54

switch http.group.file.date.format to http.parse.file.date.format

merge

add release.separator Closes genouest#42

remove only from prod if keep old sessions