[8.0] Port the module 'account_move_template' to the new API

This PR contains the module ***account_move_template*** ported to the new API.
Test and installation seems to me ok.

Let's see what will be the TravisCI response and your reviews :wink: 
When you access field, it will call ensure_one():
https://github.com/odoo/odoo/blob/8.0/openerp/fields.py#L761

On Tue, Dec 9, 2014 at 4:39 PM, Alex Comba <notifications@github.com> wrote:

> In account_move_template/account_document_template.py
> <https://github.com/OCA/account-financial-tools/pull/101#discussion-diff-21536148>
> :
>
> >          count = 0
> >          for line in template.template_line_ids:
> >              if line.type == 'input':
> >                  count += 1
> >          return count
> >
> > -    def _get_template_line(self, cr, uid, template_id, line_number):
> > -        for line in self.browse(cr, uid, template_id).template_line_ids:
> > +    @api.multi
> > +    def _get_template_line(self, template_id, line_number):
>
> Please expand a bit what you mean with
>
> it will raise the same error
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/OCA/account-financial-tools/pull/101/files#r21536148>.
>