max product inference for factor graph model
added UWedgeSep and python modular examples for all current ICA methods
Refactoring of StreamingSparseFeatures: Removed current_vector and current_length
* Removed code duplication; simpler initialization.
* Using non-refcounted sparse vector to avoid double-frees when using get_vector().
Added quadratic support in HashedDocDotFeatures
Merge pull request #1449 from tklein23/refactoring_streaming_sparse_features

Refactoring of StreamingSparseFeatures: Removed members current_vector/_length
Merge pull request #1447 from pickle27/develop

added UWedgeSep Alg and python modular examples for all current ICA methods
Merge pull request #1379 from hushell/fg_dev

max product inference for factor graph model
add LibSVMFile
add get_diagonal_vector() method to SGMatrix class
Merge pull request #1451 from votjakovr/feature/get_diagonal_vector

Add get_diagonal_vector() method to SGMatrix class
Merge pull request #1450 from gsomix/feature/libsvm

Add LibSVMFile
Merge pull request #1342 from van51/feature/quadratic

K-skip ngrams for quadratic support in HashedDoc classes