[Rigo] always use units in rigo.css, clears warnings
[client] update transations
[Rigo] update translations
[server] update translations
[entropy.client.interfaces.dep] _lookup_library_packages_available: do not pull in conflicting slots

This could happen because of the shallow checks that were done inside
this method.
[entropy.spm] _extract_pkg_metadata_provided_libs: consider symlinks valid

This has caused a meltdown of the metadata and QA failures all around
Release Entropy 170
Tagging Entropy version 170
Merge remote-tracking branch 'upstream/master'