Updated CHANGELOG for 0.18.1-rc1.
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+Release Notes - Mesos - Version 0.18.1
+--------------------------------------
+* This is a bug fix release.
+
+** Bug
+ * [MESOS-979] - Master segfault when tasks.json endpoint is hit
+ * [MESOS-1045] - Unrecognized file extension in CommandInfo.URI causes executor to exit
+ * [MESOS-1078] - JNI calls hasNext on ArrayList instead of iterator.
+
+
Release Notes - Mesos - Version 0.18.0
--------------------------------------
* The primary feature of this release is a refactor of the isolation
