change output format of FeatureVector and WeightVector
add SVMTrainRunner.java for test
modify SVMTrainRunner for zero division
modify to return 0 at WeightVector::innerProduct if xScale is 0
add WeightVectorTest and modify WeightVector to construct instance from String
modify SVMTrainRunner to output weight as String
add ClassifierTestRunner to examples
rename SVMLearner to SVMPegasosLearner and SVMTrainRunner to SVMPegasosTrainWithCacheRunner
add SVMPegasosTrainInMemoryRunner to examples
add getSquaredNorm() to FeatureVector
fix bug not to scale weight in SVMPegasosLearner
modify lambda in SVMPegasosTrainInMemoryRunner and SVMPegasosTrainWithCacheRunner
add SVMDCDLearner, SVMDCDTrainInMemoryRunner and SVMDCDTrainWithCacheRunner
rename enums of AllReduceCoordinator.Command
remove redundant Generics of AllReduceCoordinator
rename myorg.allreduce.AllReduceCoordinator to myorg.network.NodeInfoIndexServer
delete redundant myorg.examples.allreduce.AllReduceReducer
change AllReduceClient to use IntWritableSumAllReducer
rename allreduce example classes
delete redundant import