Added preliminary Vowpal Wabbit data structures
Vowpal Wabbit feature generation implemented
Explicit conditional
Merge remote-tracking branch 'origin/develop-experiments' into develop-vw
Do not train on zero examples for VW
Implemented VW load
Write VW model
Fixed VW MPI merge features
Fixed absolute difference of losses
Removed commented code
Merge remote-tracking branch 'origin/develop-experiments' into develop-vw
Added vowpal settings variables
Integration with VW program
Added save_resume parameter to VW