Fix typos in README

Signed-off-by: Chengwei Yang <yangchengwei@qiyi.com>
Fix default value of mesos_task_mem and mesos_task_disk in README

Signed-off-by: Chengwei Yang <yangchengwei@qiyi.com>
Fix reporting bugs link in FAQ

Signed-off-by: Chengwei Yang <yangchengwei@qiyi.com>
default http port changed to 8080

Signed-off-by: Chengwei Yang <yangchengwei@qiyi.com>
Correct default zookeeper path for chronos in README

Signed-off-by: Chengwei Yang <yangchengwei@qiyi.com>
Merge pull request #214 from chengweiv5/master

Fix reporting bugs link, typos, http port, zookeeper path