<p>I made some simple changes, let me know if you think any of the changes should be reverted.  Mostly I just made a few style fixes, moved it to <code>mlpack::data</code> from <code>mlpack::util</code>, and added another test.</p>

<p><a href="https://github.com/mlpack/mlpack/commit/213a04d31645134b61aa7d3702360bb34796d7de" class="commit-link"><tt>213a04d</tt></a> Add another test, and check that we aren't duplicating points.<br>
<a href="https://github.com/mlpack/mlpack/commit/35149daee158f2d4299eedb590376ba4a4c21a5a" class="commit-link"><tt>35149da</tt></a> Style fixes.<br>
<a href="https://github.com/mlpack/mlpack/commit/410bed0b7aa97b34ef988b037b8a3c4b393abe39" class="commit-link"><tt>410bed0</tt></a> Move SplitData to data namespace.<br>
<a href="https://github.com/mlpack/mlpack/commit/c20195c1412cfa163e4feaaa8fd8544c7b3a12a6" class="commit-link"><tt>c20195c</tt></a> Move  to standard include.</p>

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