cleanup and probability outputs
minor typos
adjust the API for model selection
add SVR examples
Merge pull request #2400 from Saurabh7/svmnbs

Update svm nb
Merge pull request #2423 from Saurabh7/regressnbs

update regression nb
names of files changed
modular interface added
kde notebook added
Effects of h and num_samples added;comments addressed
Merge pull request #2429 from mazumdarparijat/pca

paths to files changed
add bounding method in factor graph model for submodularity
Fix few typos in MMD notebook.
Guard LDA in GUIClassifier against missing Eigen.
Merge pull request #2411 from yorkerlin/develop

adjust the API of KL methods for model selection
Merge pull request #2433 from iglesias/notebook/mmd_fixes

Fix few typos in MMD notebook.
improve the  performance of softmax
Merge pull request #2434 from iglesias/fix/GUIClassifier

Guard LDA in GUIClassifier against missing Eigen.
Merge pull request #2435 from yorkerlin/develop

improve the  performance of softmax
Merge pull request #2427 from mazumdarparijat/kdensity

Kernel density estimation