Fixed bug where gtest filter wasn't properly being setup for tests.

Review: https://reviews.apache.org/r/9798

git-svn-id: https://svn.apache.org/repos/asf/incubator/mesos/branches/0.11.x@1454140 13f79535-47bb-0310-9956-ffa450edef68
Fixed LICENSE and NOTICE.
Updated CHANGELOG for 0.11.0.
Fixed CHANGELOG to include 0.11.0 release notes.
*** Modified for 0.11.0 *** Added a support script for doing releases.
Fixed release script to use git instead of svn.

Review: https://reviews.apache.org/r/11381
Added DISCLAIMER to the distribution.

Review: https://reviews.apache.org/r/11463
Fixed NOTICE and LICENSE.

Review: https://reviews.apache.org/r/11471
Merge branch '0.11.x' of https://git-wip-us.apache.org/repos/asf/incubator-mesos into 0.11.x