[REF] [IMP] mail_alias improvement

alias_name is not required anymore
crm, hr_job, project, mail_group, res_users: alias creation is now different
and done more like other inherits, except an alias_model_name that is given
to the context to find the alias alias_model_id.
crm, jr_job, project, mail_group, res_users: updated form views using
aliases
mail_alias: added a filter on 'inactive' aliases (alias_name False) and
added a button to redirect to the related document if any

bzr revid: tde@openerp.com-20130409111158-bv04n5o01z9l3c17