Use full command name instead of short name

Full name is better understood.
Merge pull request #130 from tanarurkerem/full-name

Use full command name instead of short name
Clarify comments
Merge pull request #131 from tanarurkerem/comment

Clarify comments
Add fig configuration
Add documentation to README
typo
add settings.php
Add database name to README
Set right dockerfile
Create database at the first run
Use existed container instead of creating new.

It is possilbe only from Docker 1.3
Merge pull request #132 from tanarurkerem/docker

Docker tesztkörnyezet a gyorsabb fejlesztésért.