Merge lp://qastaging/~openerp-dev/openobject-server/trunk-reexport-thu into lp://qastaging/openobject-server

Time for some bikeshedding:

    # 0
    from openerp import *
    class res_user(Model):
      _columns = { 'name': Char() }

    # 1
    from openerp import exceptions, fields, models
    class res_user(models.Model):
      _columns = { 'name': fields.Char() }

    # 2
    import openerp
    class res_user(openerp.Model):
      _columns = { 'name': openerp.Char() }

    # 3
    import openerp
    class res_user(openerp.models.Model):
      _columns = { 'name': openerp.fields.Char() }

I think I like #1: openerp is not just an orm, so having openerp re-exporting the (admitedly commonly used) Model, Char, ... symbols seems to stress too much the orm side.

We also have openerp.exceptions which provides Warning, AccessDenied, AccessError. I like those to be on the same level as Model, Char, ... (which is the case when openerp.models lives side by side with openerp.fields).

But openerp is also about the workflows, the WSGI stack, import/export, reporting, maybe about process monitoring (I wish it was not), ... and really the use of models.Model, and fields.Char is just a few more characters among thousands of lines.

Thoughts?