HADOOP-1398.  Add in-memory caching of data.
HADOOP-1398.  Add in-memory caching of data.

git-svn-id: 668d62911a2146bc377acf2bd6bf5b62616bda0a@617508 13f79535-47bb-0310-9956-ffa450edef68

cloudera/hbase,cloudera/hbase,matteobertozzi/hbase,bcopeland/hbase-thrift,Shmuma/hbase-trunk,Shmuma/hbase-trunk,bcopeland/hbase-thrift,cloudera/hbase,lichongxin/hbase-snapshot,Shmuma/hbase-trunk,jyates/hbase,StumbleUponArchive/hbase,cloudera/hbase,matteobertozzi/hbase,matteobertozzi/hbase,bcopeland/hbase-thrift,centiteo/hbase,jyates/hbase,StumbleUponArchive/hbase,francisliu/hbase_namespace,optimizely/hbase,francisliu/hbase_namespace,lichongxin/hbase-snapshot,ryanobjc/hbase,cloudera/hbase,Shmuma/hbase-trunk,StumbleUponArchive/hbase,bcopeland/hbase-thrift,jyates/hbase,optimizely/hbase,centiteo/hbase,francisliu/hbase_namespace,optimizely/hbase,francisliu/hbase_namespace,jyates/hbase,lichongxin/hbase-snapshot,StumbleUponArchive/hbase,StumbleUponArchive/hbase,StumbleUponArchive/hbase,matteobertozzi/hbase,jyates/hbase,lichongxin/hbase-snapshot,Shmuma/hbase-trunk,matteobertozzi/hbase,adragomir/hbaseindex,optimizely/hbase,jyates/hbase,centiteo/hbase,centiteo/hbase,matteobertozzi/hbase,francisliu/hbase_namespace,matteobertozzi/hbase,lichongxin/hbase-snapshot,optimizely/hbase,bcopeland/hbase-thrift,cloudera/hbase,adragomir/hbaseindex,Shmuma/hbase-trunk,adragomir/hbaseindex,ryanobjc/hbase,adragomir/hbaseindex,bcopeland/hbase-thrift,centiteo/hbase,ryanobjc/hbase,jyates/hbase,adragomir/hbaseindex,StumbleUponArchive/hbase,adragomir/hbaseindex,Shmuma/hbase-trunk,centiteo/hbase,francisliu/hbase_namespace,ryanobjc/hbase,matteobertozzi/hbase,lichongxin/hbase-snapshot,bcopeland/hbase-thrift,ryanobjc/hbase,optimizely/hbase,ryanobjc/hbase,jyates/hbase,francisliu/hbase_namespace,francisliu/hbase_namespace,adragomir/hbaseindex,matteobertozzi/hbase,francisliu/hbase_namespace,jyates/hbase,centiteo/hbase