[IMP] remove useless locking from update()

Locking shouldn't be needed here because the data we read is immutable
Merge pull request #9 from numerigraphe/7.0-no-lock-in-update-1308635-ls

[IMP] remove useless locking from update()
Merge branch '7.0' into 8.0
Move base_report_to_printer to root from __unported__
Set module installable
Extract description of the module in README.RST
base_calendar passed away
Migrate ir_report.py to new API
Migrate printing.py to new API
Migrate res_users.py to new API
Migrate report_xml_action.py to new API