Added global minimum search for PNN training.  Used to find optimal sigmas using crude search and refinement with brents method.
Added global minimum search for PNN training.  Used to find optimal sigmas using crude search and refinement with brents method.

git-svn-id: f699b99be54c313e643266d5dd560bc939300b59@2348 f90f6e9a-ac51-0410-b353-d1b83c6f6923

danilodesousacubas/encog-java-core,SpenceSouth/encog-java-core,Crespo911/encog-java-core,SpenceSouth/encog-java-core,krzysztof-magosa/encog-java-core,Crespo911/encog-java-core,danilodesousacubas/encog-java-core,krzysztof-magosa/encog-java-core,ThiagoGarciaAlves/encog-java-core,ThiagoGarciaAlves/encog-java-core,spradnyesh/encog-java-core,spradnyesh/encog-java-core