Merge pull request #134 from rxin/readme

Fixed a typo in Hadoop version in README.

(cherry picked from commit d407c0732aa7855a3b150975931425fe9ba30519)
Signed-off-by: Reynold Xin <rxin@apache.org>
Merge pull request #133 from Mistobaan/link_fix

update default github

(cherry picked from commit 41ead7a74533ffdd208a4ba2f7cd38945b4343ec)
Signed-off-by: Reynold Xin <rxin@apache.org>