feature_vector: Constify print parameter

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
feature_vector: Add euclidean distance function

Based on code by Gayatri Sonie <gsonie@gmail.com>

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
Implement heap to keep track of nearest vectors.

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
get nearest vectors from the databse.

Based on code by Gayatri Sonie <gsonie@gmail.com>

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
Implement nearest neighbour voting.

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
Fix class name memory leak.

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>