Updated installation-makahiki-vagrant-environment-setup.rst.

* Added note stating that the "vagrant box add" command needs to be run again for each Windows user that will be using Vagrant. 
* Changed ``precise32`` to "precise32" in several places for consistency. 
* Added note stating that Vagrant versions greater than 1.2.4 may work but have not been tested; the latest version as of October 8, 2013 is 1.3.4.