outdated installation-documentation

[tectumopticum]

Current Behavior

In https://github.com/nbuchwitz/icingaweb2-module-map/blob/master/doc/01-Installation.md there are a few outdated or inconsistent requirements

Possible Solution

update documentation

[nbuchwitz]

Happily accepting pull requests for this

[ctrue9000]

does the map module work without monitoring module but with icingadb?