Merge branch 'logic' into 'master'

First version with a running database connection
Merge branch 'logic'
Doku added
Generate initial documentation with 'sphinx-quickstart'
Ignore the generated output
Split up the initial dokumentation
Add the theme from 'Read the Docs' and translate it into german
Add section capitions
Reformat the databaseconfiguration
Add the information that closing also does a logout
Reformat the dependency section of the installation docu
Remove the links to some special overviews

We don't need them an do not fill them with data
Add a greetings text
Add login informations for the Demodatabase
Java und MySQL Installationsbeschreibung
Links to JRE and MySQL
Minor: Remove unnecessary variable
Merge remote-tracking branch 'origin/doc' into logic