runbot move constants
runbot multihost
runbot dont send dead builds longpolling to runbot
[FIX][runbot] Add context parameter

Cron function receive context parameter but no send it.
This is important for manage inherit function

(Rebase of #32)
runbot createdb locally using commandline
[FIX] add host field to tree and form view
[FIX] add host name instead of domain name in templates
[FIX] fix url in build
[FIX] fix url for full/base logs
[IMP] removes meaningless running and testing max

the runbot don't know how many machines are working and their specific
configurations.
[MERGE] Merge from odoo/odoo/master