Batch mvpa postproc now produces data frame for R

The output is now built with R in mind.

This could be improved upon by adding info about the classification, so
that we don't have to figure it out based on the name in R later.
reorder arguments for CM_batchMvpaPostProc
Check that files loaded before batch mvpa post proc
Return dataframe format csv in batch mvpa post proc

Return one line per subject and include some more information about what
parameters created this classification.