Merge remote-tracking branch 'upstream/master'
- Added new folder for validation stuff
- Sort called Validation sort which parses the list mode text output and increments spectra which will be used for validating the simulation
- Energy spectra for each crystal implemented, more to follow
- Spectra are saved to root file
- Instructions for compilation in the comments
Merge remote-tracking branch 'upstream/master'
Merge pull request #14 from carlu/master

First draft of sort code for validation of simulation output.