[FIX] sitemap does not show pages

the /page/ controller was not using the ``page`` converter
Merge pull request #587 from odoo-dev/master-incomplete-sitemap-fme

[FIX] sitemap does not show pages (Fixes #452)

the /page/ controller was not using the page converter
Merge branch 'master' of https://github.com/odoo/odoo into master-linux64