Mahout 1541

MAHOUT-1541 WIP, need access to an RDD, which used to be in a DrmLike[Int]. Still need the DrmLike to pass in to cooccurrence but need the RDD to write a text file. CheckpointedDrmSpark doesn't have the DrmLike? 
I don't think we need to bring any dfs utils into scala. First, why is it not covered by Hadoop "glob"s or tons of hdfs helpers that Sean had created? Second, i think it needs to be shared by all platforms hence it probably needs to go where this common stuff resides in java.