Various tweaks to c++ itemset mining
- fixed use of consideredSubsets, which previously resulted in large chunks of search tree being omitted
- changed assert on subset occurrence to a warning, as it can arise in somewhat-pathological cases
Tweaking itemset miner to avoid checking duplicate (unordered) combinations of annotations
Parallelised patterns::getFrequentSubsets over images, with locking to ensure considered-sets sets are updated safely
- also added -fopenmp to build configuration
- note that this provided greater speedup than a mutex-free parallelisation at the level of getOccurrenceCount
Tweaked c++ SUN-2012 loader to strip ' side' suffix