Added documentation to roc functions.
ROC updates

Produces unpleasant debugging output, but thats useful at this stage. Changed a few lines of code that were causing problems in various empirical and naive co-occurrence tool calculations. This is an ugly pull request which will have to be updated later.
Merge pull request #3 from wdwvt1/roc_updates

Roc updates
Merge pull request #4 from sowe9385/master

-m changed timeseries defs