[IMP] make qweb raise an error on template not found
[IMP] make qweb raise an error on template not found

--HG--
extra : convert_revision : xmo%40openerp.com-20110324124221-ws4lxkd97sc6s159

vnc-biz/openerp-web,gisce/openerp-web,vnc-biz/openerp-web,MarkusTeufelberger/openerp-web,splbio/openerp-web,vnc-biz/openerp-web,splbio/openerp-web,splbio/openerp-web,vnc-biz/openerp-web,MarkusTeufelberger/openerp-web,gisce/openerp-web,MarkusTeufelberger/openerp-web,gisce/openerp-web