chore(EpsDevTools.Web): add Posh-GitHub, VsVars

 - latest versions of Git aliases
 - bump FireFox to 20.0.1
 - bump up minor versions of Sublime Packages
 - SublimeText2.WebPackages 0.2.X adds support for
   CoffeeScript autocompletions
 - remove Vagrant (since its part of VM package)
chore(EpsDevTools.Web): release 0.4.0