* Use Colored UI if stdout is a tty
* Add format options to operator unseal
* Add format test on operator unseal
* Add -no-color output flag, and use BasicUi if no-color flag is provided
* Move seal status formatting logic to OutputSealStatus
* Apply no-color to warnings from DeprecatedCommands as well
* Add OutputWithFormat to support arbitrary data, add format option to auth list
* Add ability to output arbitrary list data on TableFormatter
* Clear up switch logic on format
* Add format option for list-related commands
* Add format option to rest of commands that returns a client API response
* Remove initOutputYAML and initOutputJSON, and use OutputWithFormat instead
* Remove outputAsYAML and outputAsJSON, and use OutputWithFormat instead
* Remove -no-color flag, use env var exclusively to toggle colored output
* Fix compile
* Remove -no-color flag in main.go
* Add missing FlagSetOutputFormat
* Fix generate-root/decode test
* Migrate init functions to main.go
* Add no-color flag back as hidden
* Handle non-supported data types for TableFormatter.OutputList
* Pull formatting much further up to remove the need to use c.flagFormat (#3950)
* Pull formatting much further up to remove the need to use c.flagFormat
Also remove OutputWithFormat as the logic can cause issues.
* Use const for env var
* Minor updates
* Remove unnecessary check
* Fix SSH output and some tests
* Fix tests
* Make race detector not run on generate root since it kills Travis these days
* Update docs
* Update docs
* Address review feedback
* Handle --format as well as -format
* added a flag to make common name optional if desired
* Cover one more case where cn can be empty
* remove skipping when empty; instead check for emptiness before calling validateNames
* Add verification before adding to DNS names to also fix#3918
With Vault Version: 0.9.1, the following is returned when using "rules" for policies operation:
```The following warnings were returned from the Vault server:
* 'rules' is deprecated, please use 'policy' instead```
* website: add note about the 0.9.2+ CLI changes to reduce confusion
* website: fix frontmatter for 0.9.3 guide, add to guides index
* website: add overview title to 0.9.3 guide for spacing
Calvin Leung Huang