User Interface: helper macro & GUI
Assertion:
- end users should not have to deal with details of file manipulation, random access to events and some histogram manipulation
Create helper macro to work in conjunction with ‘standard’ Event class
- open, reopen, rewind files
- process n events from anywhere in the file
- clear histograms
- well-defined places to put histogram definitions and event loop code
Create GUI to give even easier access to helper member functions