generate a page for each rule
add resources to rule page
provide hook to time_series_path
scale time series data for tasks
plot task time_series with gnuplot
link to image from rule page
generalize time_series format
scale aggregate time_series data
align images and text on rule page
provide useful error message on incompatible versions of Ruby
Added option to overwrite existing files.

This option allows the generator to skip a lot of work if it has been done previously.
some more optimizations
differentiate aggregate cpu time
add lib to load_path