Placeholders for regression tree JS API; plus minor fixes
GetNextNode is not limited to classification
The code now uses GLib exclusively
Added JS interface for regression Hoeffding trees
Added regression tree code; added JS interface; added usage example; added simple regression dataset
All HoeffdingTree asserts now throw exception
All HoeffdingTree FailR's now throw exception
Minor changes of regression tree learner
Added another exampel with SAE dataset
Placeholders for regression tree JS API; plus minor fixes
GetNextNode is not limited to classification
The code now uses GLib exclusively
Added JS interface for regression Hoeffding trees
Added regression tree code; added JS interface; added usage example; added simple regression dataset
All HoeffdingTree asserts now throw exception
All HoeffdingTree FailR's now throw exception
Minor changes of regression tree learner
Added another exampel with SAE dataset
	modified:   src/glib/mine/hoeffding.h
Silly merge