tree c91c0c18bab8e550b7ee715873122c0fa5a45c37
parent 96312a2acaa547ba486fb2a827eeaf87da0cb271
author manuzhang <owenzhang1990@gmail.com> 1486386041 +0800
committer manuzhang <owenzhang1990@gmail.com> 1486386041 +0800

[GEARPUMP-23] Refactor Window DSL

Be sure to do all of the following to help us incorporate your contribution
quickly and easily:

 - [x] Make sure the commit message is formatted like:
   `[GEARPUMP-<Jira issue #>] Meaningful description of pull request`
 - [x] Make sure tests pass via `sbt clean test`.
 - [x] Make sure old documentation affected by the pull request has been updated and new documentation added for new functionality.

Author: manuzhang <owenzhang1990@gmail.com>

Closes #138 from manuzhang/window_dsl.