Initial import of k-means stuff

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@11158 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Moved routine for computing priming data from CanopyMapTask to ClusterUtils

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@11159 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Added a utility method for serializing a supplied object directly into the staging area in HDFS and adding it to the distributed cache for a job

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@11160 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Added a debug flag and logging to apache commons logging

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@11161 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Inproved the stopping of the job (now stops internal arff and randomize jobs)

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@11162 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Small javadoc fix

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@11163 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Initial import of KMeans hadoop wrapper

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@11164 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Updated for k-means

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@11165 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Now ensures that no header row is specified on the CSVSaver delegate

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@11166 e0a1b77d-ad91-4216-81b1-defd5f83fa92