[IMP] Added quantity as type and variable_factor + sequence for flexibility to delivery grid line
[IMP] remove setting of color.ui

After further considering PR #21's arguments, the setup script should
not go around setting `color.ui`:

* it shouldn't be needed for recent gits with default compile
  settings[0]
* it may override advanced users's own colour configuration/
  customisations (or disabling)
* it forces default colours on users for which it may be useless
  (colour- blind) or even detrimental (other vision impairments)
* some linux distributions apparently default to idiotic pagers which
  can't handle ANSI colour codes by default and spew garbage to the
  terminal

[0] https://github.com/git/git/blob/master/Documentation/RelNotes/1.8.4.txt#L178-L180
Add quantity in variable factor too...

I forgot to add the changes before committing
[IMP] website_forum: make forum;forum inherit from mail.thread. This way we
add the possibility to users to follow a forum and be automatically followers of new
questions, using some new subtypes on the forum.forum model that do the auto subscription.

Also added a profile link on the forum, when logged.

Also added a subscribe button on the forum.
Merge pull request #160 from odoo-dev/master-forum-subtypes-tde

MERGE [IMP] website_forum: make forum.forum inherit from mail.thread. This way we add the possibility to users to follow a forum and be automatically followers of new questions, using some new subtypes on the forum.forum model that do the auto subscription.

Misc :

also added a profile link on the forum, when logged.
also added a subscribe button on the forum.
Add < and > operators to allow rules without gap (eg: until 100 & above 100)
Add sequence field with handle in tree view
[FIX] website_sale: still cleaning lost references to deleted code in website_sale ...

Fixed checkout redirection that was meant to clean the session (incorrect sale order or transaction) that may happen
when having issues with the payment.
[CLEAN] Use none or false, but not both on two lines ...
Improvement of the delivery module

Add field sequence on the delivery.gird.line to order rules
Add condition quantity to add more flexibility in the rules
Add operators > and < to be able to create rules without gap (instead of needing hack like 'x <= 100', 'x >= 100.000001')
Merge pull request #164 from odoo-dev/master-website_sale--fix-tde

[FIX] website_sale: cleaned call to removed methods in website_sale