* [#929] Modification to comand vela show WORKLOAD_TYPE or TRAIT
* update the describetion of --web
* [#929] update --web describtion
* update the doc of check-ref-doc.md
* remove --sync parameter
- Splitted autoscale docs to be appfile focused,
and add cpu utilization scaling policy for appfile
- Allow user to input parameter with int type, like
10 instead of "10"
- Change cpuRequest/cpu to proper names
To fix#564