Squashed commit of the following:

commit 1b4f01a05de043ebacc2af1d380ce269a9e53122
Author: David Yan <david@datatorrent.com>
Date:   Tue Jan 28 12:23:50 2014 -0800

    migrated whalin memcache

commit 2393226576bdf5fd5407a971b1fa3806707e6eb1
Author: David Yan <david@datatorrent.com>
Date:   Mon Jan 27 19:01:44 2014 -0800

    memcache migration

commit 5ac6228f2ae8bdc76933e51d8087b28a28bfc5ec
Merge: 8a22da2 f80cd52
Author: David Yan <david@datatorrent.com>
Date:   Mon Jan 27 14:54:03 2014 -0800

    Merge branch 'master' of https://github.com/DataTorrent/Malhar

commit 8a22da2d0efacbf4ee4f72a75af0eea4d63cfc8d
Merge: 09ce838 b94f747
Author: David Yan <david@datatorrent.com>
Date:   Wed Jan 22 16:36:31 2014 -0800

    Merge branch 'master' of https://github.com/DataTorrent/Malhar

commit 09ce8388061d806aa1353d25c9b14c1962af13dc
Author: David Yan <david@datatorrent.com>
Date:   Wed Jan 22 15:38:23 2014 -0800

    removed duplicates in pom

commit c10b815a3fe7441a71ea843e7c44b0d9c3ecb92e
Merge: 0afe7e0 f62c0ea
Author: David Yan <david@datatorrent.com>
Date:   Wed Jan 22 15:27:54 2014 -0800

    Merge branch 'master' of https://github.com/DataTorrent/Malhar

commit 0afe7e033308a9844ee4985982339d5a0480ae9b
Author: David Yan <david@datatorrent.com>
Date:   Tue Jan 21 18:43:35 2014 -0800

    corrected comment

commit 18a062c2c185fab13f4d75ce1e629a54cb8f12f6
Author: David Yan <david@datatorrent.com>
Date:   Tue Jan 21 18:36:47 2014 -0800

    added AbstractStoreInputOperator
got rid of dead code
Merge pull request #656 from davidyan-malhar/memcache_migration_pull

MLHR-657 #resolve Migrated memcache adapters to use the new interface