Adding License to README
Point the default precise64.box to the one hosted on parallels CDN and prepared by veewee.
Merge pull request #81 from racktear/master

Base box 'precise64' URL changed to the one hosted on Parallels CDN.
Update README.md

'Box Format' section fixed
action.rb: added 'BoxCheckOutdated'
Changed README.md

Merged 'master' branch, edited 'Networking' and 'Provider Specific Configuration' section

* master:
  Update README.md
  Point the default precise64.box to the one hosted on parallels CDN and prepared by veewee.
  Adding License to README
Networking: use Vagrant guest capability instead Parallels Tools [GH-83]