Create application for quering raw archive data

[klangner]

First step will allow to find all events related to given repository. It will work like this:

java gha.jar find_events --repository=klangner/matrobot --data=/home/user/githubarchive --output=events.csv

This will create CSV file with events related to repository klangner/matrobot

Then I'll extend this application with functionality from other issues.

[klangner]

done