Outdated README.md

[jhuiting]

Hi, as of the recent Vagrant versions vagrant up does require to pass the --provision flag to the vagrant up command to do an actual provision. Maybe you can update this in your readme file.

[hurrycaner]

Hey, the --provision is not needed, because when you send vagrant up, the --provision is already default... the use of --no-provision is just for when your vm has already been provisioned once.