New objects/additions V 1.7

The splider is split into a Core and Extra.  Extra packages are now extra downloadable zip-archinves.
 
New objects implemented:

• rbfnet  - A Radial basis function network. 
• adaboost - Adaboost using sampling. 
  

Small additions / bug fixes / issues:

• libsvm_classifier  - replaced custom kernel copying by direct access to a mxArray data field. speeds up custom kernel usage.
• nmf faster training and correct testing
• mrs eliminated bug from training
• updates libsvm_classifier to a more recent version: 2.81