Removed :: and added parameter support.

Changelog

This is probably my first changelog!

• ** Removed** '::'. Instead use && for chaining.
• Added parameter support. For example:

  cbuff push "mkdir {}" create-project-dir
  cbuff push "pushd {} && git init && popd" init-git
  cbuff push "cbuff create-project-dir {} && cbuff init-git {}" setup-project
  cbuff setup-project my-new-project my-new-project
  

  I know you see the problem here. We have to write my-new-project two times. I will fix this in the next patch :)