change means to clumps.
classify into clusters.
average cluster.
change semantics of clump. should return a new object, instead of modifying in place.
rename method without bang.
add types a and b
add debug statements.
fix bug and method that empties points array on clump object.
tidy up.
remove tests -- no longer needed and add contracts to kmeans main namespace.
rename var.
whitespace.
add readme.
bump.
Merge branch 'release/0.0.3' into develop