fix(devtools.web): add FireFox, lock nodejs, order

 - Node.js fixed on 0.8.22 (previous version string would install the
   earliest version)
 - Include FireFox
 - Reworking some dependency ordering - for instance, a number of
   config options depends on fonts being installed early, git config
   needs diffmerge installed, browsers installed before any Sublime
   config that might need to find them
chore(devtools.web): release 0.2.0