compute covariance matrix more efficiently
Merge pull request #1440 from votjakovr/feature/gp_refactoring

Compute covariance matrix more efficiently
added push check state file to make superlu check work for cmake 2.8.4
Add BaggingMachine
Add basic label combination rule implementations for ensemble learning
Add MockMachine, MockFeature, MockLabels
make n a local variable to fix name clash
max product inference for factor graph model