orm optimization: don't compute all fields for view.
orm optimization: don't compute all fields for view.

Some fields may not be requested by the view DOM. Don't try to fetch
their information.
This is an experimental optimization. Testing pending.

gisce/openobject-server,gisce/openobject-server,MarkusTeufelberger/openobject-server,ovnicraft/openerp-server,MarkusTeufelberger/openobject-server,vnc-biz/openerp-server,vnc-biz/openerp-server,gisce/openobject-server,MarkusTeufelberger/openobject-server,xrg/openerp-server,splbio/openobject-server,splbio/openobject-server,ovnicraft/openerp-server,splbio/openobject-server,xrg/openerp-server