make static data fields public
rename knn classifier
make mini_project_fbie depend on classifiers
remove redundant classifiers
re-write classifiers to use ICLassLabel
completely re-write Sample to use IClassLabel subclass

This commit introducing ClassLabel, a wrapper for an enum that implements IClassLabel. Should maybe later moved directly to Sample.
change main to use classifiers and IClassLabel
some fixme comments
add normalizer class
fix number cleaning
move label enum to Sample
use log coherently
use l instead of k as identifier for labels
add first iteration of distance function
give debug output on classifier accuracy
re-factor constructors a bit and add commentary
change ambiguos naming of inner class Distance
add settings for classifiers project