Improve comment in Vagrantfile.
Improve README layout (steps to create test).
Add ls.db as database server.

* New ls.db vagrant box.
* Split setup for ls.db and ls.ext in top.sls.
* New salt states for mysql (create DB / networking).
* Introduce dbhost / dbport for database in config.
* Rename and split salt states.
* Makefile changes.
* Update illustration and readme.
* Simple mechanism to migrate admin.sls for those who use example.