Merge pull request #1625 from odoo-dev/master-views-arch-on-disk-fme

Merge pull request #1625 from odoo-dev/master-views-arch-on-disk-fme

[MERGE] Read ir.ui.view's arch from disk in development mode

A new switch named `--dev` has been added to the openerp.cli's arguments.

This development mode's purpose is to activate some specific behaviours in order to ease development.

For the moment, the only effect of `--dev` is to make the ir.ui.view's arch function field read the data from the original xml file (if any), allowing the developer to change a view and check the effect without having to update it's database.

This feature will currently work only with existing views. If you add a view you still have to update your database.