put printing logic into format_data if it's possible

[mpavlase]

https://github.com/rfmvh/perfevents-result-collector/blob/68e5fbedb6e6a513c1d851abe16d866396dd1e75/perfresultcollector/show-results.py#L67-L74

Other notes:

• please try to be consistent for name convention, such as clmn in format_data.py Rest of all variables has full English name (without abbreviation)
  • rename the method type_of_log to something more descriptive - it's too general to get an idea what it does. It matters a lot, because code (in general) is more often read (also by others) than written. Keep that in mind.

[mnecas]

643868291

[mnecas]

6e56bd8

[mpavlase]

looks good