Squashed commit of the following:

commit ff44c00d2c1092e8fb4b4eacbecd51bb40d66d2e
Author: Lloyd <lloydmeta@gmail.com>
Date:   Thu May 30 11:12:34 2013 +0900

    1. Make ChiSquare computation from MorphemeCountPools use paging
    2. Fix spacing add comments

commit 64abe51057851d9ba08aeeb3a4a317c6821e5a03
Author: Lloyd Meta <lloydmeta@gmail.com>
Date:   Thu May 30 08:50:37 2013 +0900

    Partially done

commit a8380d3f75f9d1640a9a7841ddf201ffc848ce94
Author: Lloyd <lloydmeta@gmail.com>
Date:   Wed May 29 19:03:16 2013 +0900

    It compiles and added zCard and totalSetScore methods to MorphemeRedisRetriever.scala