Create a virtual development environment with all dependancies automatically download and installed in a self-contained VM.  Use Vagrant to manage the virtual machine, tested with Vagrant 1.5.1.
Remove the xc8/xc16 installers from the VM since they're cached on the host.
Check exit codes when installing xc8 and xc16, otherwise when the 32bit compatibility libs aren't present (they should be) it will fail silently because .run files are weird.
Install rake and include 32bit stdlib so we can build pic24 projects and run unittests in sim30.
Merge pull request #53 from amcgee/vagrant-dev-environment

Create a virtual development environment