draw module removed from wrong location and some bugs fixed
clusters functions are separated into stand alone module
Added and improved functions for work with gears
misc_functions module got updated functions for new rs
added fields for clusters settings
Added clusters functionality and
removed some obsolete functions and
debugging print
Added empty aggregation gear -
just generates zeros predictions,
but can fully compatible with
clusters
Introduced nDCGp metric evaluation of
predictions - compatible with magician and
clusters