Update README.md

Adding link to better Mesos docs
Fix for metrics typo.
Update the command to run to update Chronos

-c updates the local directory. To sync to Chronos from a repo you want to omit the -c
Remove defaultJobOwner

Never used and is misleading
Merge pull request #245 from fuziontech/patch-1

Remove -c flag to sync Chronos
Merge pull request #247 from fuziontech/master

Remove defaultJobOwner
Build fix.
Limit test logging.
Update to Mesos 0.20 and add DockerInfo
Merge pull request #244 from tnachen/mesos-0.20

Update to Mesos 0.20 and add DockerInfo
Merge pull request #214 from chengweiv5/master

Fix reporting bugs link, typos, http port, zookeeper path
[Chronos] adding cluster name to the job failure/disable notification
[Chronos] clusterName related fix for review comments
getClusterPrefix is scala style
correct use of Option
Merge pull request #240 from airbnb/kp

[Chronos] adding cluster name to the job failure/disable notification