kselection 0.2.0
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* `kselection` allows to inject a function that provides a different implementation of kmeans algorithm. This feature has developed thanks Harold Pimentel.
* `nstart` is not a parameter of `kselection` to facilitate compatibility with different implementations of kmeans algorithm.
* `kselection` allows the parallel execution of the algorithm using `foreach` package.

kselection 0.1.1
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* BREAKING CHANGE: Now the `trace`option in the `kselection` function shows a trace, the progres must be selected using the `progressBar` option.
* Add the possibility that `kselection` function display a trace of the progress.
* Fix the error which appears in `kselection` when the number of rows in the input data is lower than 15.