Fix RowKey serialization + minor improvemetns
Fix RowKey serialization + minor improvemetns

satishpatil2k13/HBASE_OMID,satishpatil2k13/Alan_Gates-OMID-HBase,yonigottesman/incubator-omid,satishpatil2k13/Alan_Gates-OMID-HBase,satishpatil2k13/HBASE_OMID,ngaut/omid,yahoo/omid,yonigottesman/incubator-omid,ngaut/omid,yahoo/omid