Fix Python package meta_data license

Fix formatting in dev.md

Linkify in documentation.

Drop support for RPMs.

Updated and moved documentation to docs/

Detect complete absense of Python

Use wrapper shell script for systems without a "/usr/bin/env python"

Some systems (Ubuntu 17.04+) have nothing for "/usr/bin/env python". The
have python3 instead. This commit introduces a wrapper script that finds
out which python binary to use. Instead of linking bin/ansible-cmdb
directly to lib/ansible-cmdb (the python script), we now link to the
wrapper script.

Demote some logging from warning to info.

Allow folder in group_vars (#127)

Merge branch 'clattems-master'