Refs #8863. Add support for resolution stored as float.
Refs #8863. Better error reporting.
Refs #8863. Output warning if values/times not found.

The log is the just skipped instead of LoadMuonLog failing. It means
that if the files contains a few malformed logs, we can still load the
other ones.
Merge remote-tracking branch 'origin/bugfix/8863_old_emu_wrong_first_good_data'