Fixed comment in rakefile about the default build target
Made build independant of git to support downloading of tarball from GH and building. Previously building from the tarball would work, however running the plugin would fail causing Vagrant to complain about missing ruby files.

Removed highline as a dependency. This hasn't been used since pre-1.0, we use the built-in vagrant console out.
Updated the readme for Vagrant 1.2 support. Added notes about building using bundle. Rev'd plugin version to 1.1.
Removed custom vagrant lib finding method and replaced with more reliable built-in Vagrant::source_root
Added a workaround for slow vagrant startup time on Windows.

Vagrant runs an OS detection command for every registered guest, this is really slow on Windows as most of the commands fail. This hack short circuits the checks and doesn't make the remote OS detection call if it looks like the command is looking for Linux.
First working Vagrant 1.2 compatible plugin. Moved all the guest methods out to their new capabilities as required by Vagrant 1.2.

Added new OS detection to guest class which attempts to check for the Windows directory existance via an environment variable set through PowerShell.

Changed VM shared folder mounting to account for the forward slash Vagrant now passes along for share name. We explicitly remove the leading slash. Perhaps there is a better way?