Manually specify SSH ports for Vagrant hosts

Otherwise, they're inconsistent and based on load order :(
Include mosh in the base role

Closes #1
Rename osbridge role to osbridge-ocw, only handle OCW setup
Add a proxies-apache role to handle changing apache's port

I can't figure out how to successfully override array attributes from 
the node JSON.
Set up a mysql database for the OSB MediaWiki instance
Install WordPress for OSB, add port configuration for syndicate-wordpress
Set up nginx to proxy PHP requests to Apache for osbridge site
Install and serve osbridge common assets
Proxy OCW controller paths from nginx to OCW