Several fixes and improvements

* Added an additional setup to the bootstrap script which hecks if the installed daemons are running or not. They should.
*  Added a test case which require the cloned git repository to be updated before installing salt.
* Warn the users when nothing is going to be installed and `exit 0`. Warn the users when nothing was configured and it was supposed to configure, then `exit 0`. This simplifies other applications using the script, namely [salty-vagrant](https://github.com/saltstack/salty-vagrant).
* Add support for running a specific test case(by name).