Prototype of Driver README format.
Fix link typo in README.
Make box a required config value.
Add dry_run configuration documentation in README.
Support berkshelf-vagrant 1.1.0+ in Vagrantfiles.

With an assist going to @petejkim
Merge pull request #15 from opscode/berkshelf-vagrant-1.1.0-compat

Support berkshelf-vagrant 1.1.0+ in Vagrantfiles.
Add explanation in README.
Release 0.8.0, seattlerb edition.
Up version for development.
Update Berkshelf plugin detection

Berkshelf has recently renamed their Vagrant plugin which is already updated in master, but this detection of the old plugin will prevent a kitchen run.
Merge pull request #16 from martinisoft/fix_berkshelf_detection

Update Berkshelf plugin detection
Release 0.9.0, plugin renaming edition.
Up version for development.
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Up version for development.
  Release 0.9.0, plugin renaming edition.
  Update Berkshelf plugin detection
  Up version for development.
  Release 0.8.0, seattlerb edition.
  Add explanation in README.
  Support berkshelf-vagrant 1.1.0+ in Vagrantfiles.
  Add dry_run configuration documentation in README.
  Make box a required config value.
  Fix link typo in README.
  Prototype of Driver README format.