Separated out Java compiler options in makefile.
Sketched Java main.  ROC basics work.

* Sketched main for Java application.  Allows scores and labels to be
  specified together or separately.  Includes basic options.  Prints
  basic ROC report.
* Created a naive CSV reader for reading delimited text inputs to the
  application.
* Added application build instructions to makefile.
Wrote help for Java main.

* There are likely better ways to do the help text but this quickly gets
  things off the ground.  See the comments.
* Added idea about report class for performing output.
Added debug option to Java main.

* Debug option prints stack traces for exceptions.
* Updated copyright year.
* Corrected default exit status.
Fixed crash in Java main when providing only labels.

* Providing ranked labels by themselves was forgotten and not completely
  implemented; led to NPE (which motivated the debugging option).
* Fixed code to handle labels-only input by adding curve construction
  for ranked labels.