[FIX] project_issue, resource: fixed computation of hours / days to open (assign) or close an issue. Those fields now have a conditional store, because they were not recomputed even when changing date_open and date_closed. Changing the stage now correctly changes the date_closed. Also added some fixes in resource module, the date was not correctly taken into account when computing the number of working hours between two dates.
[FIX] crm: fixed day_open and day_close computation (conditional store + be sure that date_open and date_closed fields are set)
[FIX] mail: compose wizard: fixed default_get overrides not correctly managing the received field_list + improved custom call to default_get to correctly manage its in and out values.
[FIX] website_sale_option: make options work
Merge branch '8.0' of https://github.com/odoo/odoo into 8.0-win32