Added file I/O, and data output as CSV.

* GhostSystem.java: Fixed the wait time bug, added looping structures
  for data generation, added config file support for the simulation,
  added data exporting functionality.
* .gitignore: Ignored a mathematica notebook, since it doesn't play well
  with git
* GUI.java: Font change for readability (?)
* Logger.java: Just some comments that I'll probably delete
* config.cfg: config file for the simulation. Formatting info in
  preamble.
* output.csv: Output data as a CSV.