Removing RVM since it was a bit of a nuisance. Updating process with new custom bash script file.

Updating **DS Homestead** with updates from **Laravel Homestead**.

Removing RVM install and defaulting to Homestead ruby so it's less of a hassle and we're not using this on Rails projects so no need for managing different ruby installs.

Updates to add **bundler** and update **composer**.

@jonuy 

CC: @barryclark @DFurnes @angaither