[IMP] pyeval: implement weekday function
[IMP] pyeval: implement weekday function

courtesy of mva.  This adds the weekday function to date objects in
pyeval.  This will be useful for adding better filters (such as this
week) in the searchview.

odoousers2014/odoo,Grirrane/odoo,laslabs/odoo,addition-it-solutions/project-all,storm-computers/odoo,mkieszek/odoo,addition-it-solutions/project-all,Elico-Corp/odoo_OCB,microcom/odoo,ygol/odoo,bplancher/odoo,cdrooom/odoo,Grirrane/odoo,Elico-Corp/odoo_OCB,mkieszek/odoo,ygol/odoo,storm-computers/odoo,cdrooom/odoo,addition-it-solutions/project-all,optima-ict/odoo,microcom/odoo,alhashash/odoo,sysadminmatmoz/OCB,ygol/odoo,sysadminmatmoz/OCB,stephen144/odoo,tvtsoft/odoo8,deKupini/erp,dfang/odoo,bplancher/odoo,addition-it-solutions/project-all,Grirrane/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,cdrooom/odoo,tvtsoft/odoo8,dfang/odoo,sysadminmatmoz/OCB,dfang/odoo,deKupini/erp,mkieszek/odoo,stephen144/odoo,optima-ict/odoo,syci/OCB,storm-computers/odoo,storm-computers/odoo,odoousers2014/odoo,syci/OCB,tvtsoft/odoo8,tvtsoft/odoo8,ygol/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,microcom/odoo,laslabs/odoo,hip-odoo/odoo,mkieszek/odoo,laslabs/odoo,hip-odoo/odoo,Elico-Corp/odoo_OCB,cdrooom/odoo,ygol/odoo,hip-odoo/odoo,stephen144/odoo,dfang/odoo,optima-ict/odoo,hip-odoo/odoo,ygol/odoo,tvtsoft/odoo8,microcom/odoo,bplancher/odoo,alhashash/odoo,addition-it-solutions/project-all,stephen144/odoo,odoousers2014/odoo,alhashash/odoo,Elico-Corp/odoo_OCB,syci/OCB,tvtsoft/odoo8,syci/OCB,bplancher/odoo,syci/OCB,sysadminmatmoz/OCB,storm-computers/odoo,stephen144/odoo,Grirrane/odoo,hip-odoo/odoo,odoousers2014/odoo,alhashash/odoo,addition-it-solutions/project-all,deKupini/erp,hip-odoo/odoo,Grirrane/odoo,microcom/odoo,optima-ict/odoo,sysadminmatmoz/OCB,laslabs/odoo,laslabs/odoo,syci/OCB,deKupini/erp,odoousers2014/odoo,ygol/odoo,alhashash/odoo,odoousers2014/odoo,deKupini/erp,mkieszek/odoo,storm-computers/odoo,mkieszek/odoo,sysadminmatmoz/OCB,Grirrane/odoo,sysadminmatmoz/OCB,optima-ict/odoo,dfang/odoo,bplancher/odoo,alhashash/odoo,stephen144/odoo,optima-ict/odoo,dfang/odoo,microcom/odoo