to 3.5, we stop supporting 3.4

and results away

and do not include them as data files in python packages,
since system packages will then include them in /usr

has been removed. Also add logging

and do not use classmethod for it, since it is only a comparison

since it is not needed anymore with new stem version

since stem 1.7.0 is released and there is no need for it anymore

which includes the required Timeout changes and eliminates the
need for the deprecated dependency_links

while process-dependency-links is needed