added a CI test to read and write from a file - solving #83
This merge request implements two checks to test if the writing/reading procedure works. The following tests are performed:
- Writing to file
- Reading tracks and DUTAssociation, checking if the number of clusters assigned to track is correct
The required data file is located here: https://www.physi.uni-heidelberg.de/~huth/writing.raw I am not sure where this should be put
This fixes #83 (closed)