[IMP] website_forum: add a new karma to control the
way links displayed in posts and answers. A nofollow attribute is
added is the author has not enough karma, adding a protection for
spammer tryign to improve their SEO.
[IMP] productbetter menutips and help for product menus.
[IMP] base, ir_sequence: added use_date_range field on ir.sequence, that allows to have several sequences running for the same one depending on date ranges (similar to what was existing previously on accounting with FY, which is now deprecated) + port to new API
[FIX] web_tip: tip repositioning

* call reposition when editable list view is rendered
* also reposition the popover when reposition is called
 [IMP]project : onboarding tips to show what you can get with project and task builder.