Squashed commit of the following:

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
Merge pull request #647 from davidyan-malhar/pom_dedup_pull

Got rid of duplicate entries in pom