[SIGMON-346] New ccc notebook

Context

• https://its.cern.ch/jira/browse/SIGMON-346

What was done

• Added events_number output
• Showing low-charge events in output

TODO

• ? Anything still to be done?

QA

• template link to sonar issues:http://sonar/component_issues/index?id=_GROUP_%3A_ARTIFACT_#resolved%3Dfalse%7Cauthors%3D_PAIR1_%2C_PAIR2_
• code was unit tested | was not unit tested, because...
• acceptance tests were written | not written, because...

Review objectives

• ? assessment of code functionality
• ? assessment of code quality
• ? identifying potential refactorings / logic common to other projects
• ? knowledge sharing
• ? getting help to understand a piece of code