Fix formatting in StopWatch
Rename YowModel to DBModel
Rename Formatter to Columns
Refactor Evaluation code

Rename Configuration to Config class. Instead of using inheritance for containing specific recommender configurations
the Config class can store properties of any type. This allows more flexibility.

We can now use the config object to store DataModels Preprocessors and any kind of configuration.
Merge branch 'master' of github.com:ntnu-smartmedia/goldfish

# By Patrick Heia Romstad
# Via Patrick Heia Romstad
* 'master' of github.com:ntnu-smartmedia/goldfish:
  Added PageTimesMouse
  Creates a good test sample of dataset
  Testing different datasets
  Changed datasets to smart-sample and increased number of tests to 1000
  Added a couple of clusterers
  Implemented Densitybased and EM clusterer as well
  PreprocessorClustering returns yowmodel

Conflicts:
	src/edu/ntnu/idi/goldfish/DataSet.java
	src/edu/ntnu/idi/goldfish/Main.java
	src/edu/ntnu/idi/goldfish/preprocessors/PreprocessorClustering.java