bump version number; add hadoop version note to document.
update script and document for developers
tune document, update readme, and version for 0.4.0
minor update
[maven-release-plugin] prepare release v0.4.0
[maven-release-plugin] prepare for next development iteration
update script
[maven-release-plugin] prepare release v0.4.0
[maven-release-plugin] prepare for next development iteration
bump version