Added the installation scripts from aspnet/Home

Also deleted the kvmsetup.cmd because it is confusing and unnecessary (just run 'kvm.cmd setup' :))

Related to aspnet/homebrew-k#8
Consider mentioning why users might be seeing this message.  "Maybe you're not using zsh/bash/sh?   Update your profile by appending bla bla..  If you are already using one of zsh/bash/sh, you might be missing a Profile file, create a file with name bla bla, and append bla bla."