Dependency downloader implementation
Remove unused test
Include correct spark dependency so Zeppelin can connect actual spark cluster
Comment out some failing test
Adjust test parallelism
Merge pull request #85 from NFLabs/dep_downloader

Dependency downloader implementation
Let zeppelin build with different hadoop versions
Manage dependency version of zookeeper
Merge branch 'notebook' of github.com:NFLabs/zeppelin into notebook
Merge branch 'notebook' into newUi
update stuffs