API rewrite, optimization improvements

• massively changed API that somewhat simplifies usage of library
• 2 optimization improvements (easier, somewhat better multithreading, option to not update points if their standard deviation was already low)

Multithreading

• added constructor that enables user to provide ExecutorService
• getDeviation() is now public

Yet another release

• changed the way initial objects are created
• some bugfixes
• some refactors

Feedback update

You can use getProgress() method to get current progress.

If you want to always update progress or do something else on every iteration, you can use setOnUpdate() method.

Slightly updated release

Not much externally has changed in this version aside from package names changing

First release v1.0

First working release of simple_kmeans library.