Runs a composer update in provisioning.
Allows for running composer and artisan commands from the host machine. Can know run vagrant artisan or vagrant composer.
Merge branch 'master' of github.com:SegFaultx64/Laravel4-Vagrant
Added references to the custom vagrant commands to the readme.
Merge pull request #9 from SegFaultx64/master

Runs a composer update during provision and adds host artisan and composer commands, closes #2, closes #8