Migrating some demos to app bundle
added addSerializer function
fixing the batch start idx
Deleted SlidingWindowObject - It's not reusable.
Merge branch 'dt-dev' of github.com:DataTorrent/Malhar into dt-dev
changed the benchmark project structure
modified the benchmark project structure
Merge branch 'dt-dev' of github.com:DataTorrent/Malhar into rubyoperator