Merge pull request #172 from dg-vrnetze/feature/cleanup

cleanup method
Merge pull request #171 from dg-vrnetze/deprecation_warnings

Deprecation warnings
check for api
added new api method
added check for new steps
implement new steps
Git complained about missing \n
Added matchers for file and regex
Implemented file matchers
Load matchers
Added checks for existence of file via plain match
Use check_file_presence for regex as well
One method for all
Change the steps for matching regexes
The use of /regex/ is not ideal -> Paths can contain "/". Therefore
I chose %r<regex> as matcher
Accidently deleted test