Refactoring

Major changes:
- PCA and ICA are precomputed and loaded from transformations.RData if present.
- features can be appended to existing dataset. just comment out all the features in extractFeatures.R that should not be computed and provide the existing data set to runCompetition.
dataSet = runCompetition(PATH)
...
newDataSet = runCompetition(PATH,existingDataSet=dataSet$data)
...