Add the MEAN Stack boilerplate

* Source http://www.mean.io/
Add Vagrant setup and instructions

Based on the Vagrant setup from Chuck Haines with the following
modifications.
* Rename box variable from "developer" to "web".
* Rename final vm from "developer" to "startupwichita-web".
* Rename "developer.pp" to "site.pp"
* Lower VM memory from 2GB to 1GB to support smaller dev boxes.
* Use shared folder instead of NFS for easier Windows support.
* Add Vim and Emacs modelines.
* Remove "devict" user. Just using "vagrant".
* Move provisioner scripts to /vm/
Add basic branding to differentiate from the MEAN stack.