Untested change from by class to by observation weighting
Updated initialisation to enable setting weights by class or observation
Classes updated to account for the change in weight setting for the forest
Changes to forest to enable growing it from a processed data file object
Small clean up
Corrected the description of the training observation specification
Corrected error in the stagnation detection
Stagnation detection corrected and OOB recalls added to the G mean calculation
Changes to make forest running consistent with changes to forest class