Several changes
--Changed RCommandLineFunction to RscriptCommandLineFunction
----moved from using R CMD BATCH to Rscript
----removed extraneous parameters and added a args list parameter

--Adding nofp and nofn arguments to GatherResults.

--Adding cmdline parameter to make_graphs.r to specify output directory.
----Changed runAnalysis to pass an output directory name to make_graphs.R
Changing so that make_graphs is run twice, once for snps and once for indels.
--Altering GatherResults.scala so that it creates separate outputs for different variant types
----Passing file names as new parameters to make_graphs.r
Adding checks for missing files to make_graphs so that it doesn't crash if there are is no FN data.