* Create new documentation pages for httpapi and cliconf
* Add new documentation to plugins toctree and Makefile
* Add DOCUMENTATION to cliconf
* Apply suggestions from code review
* Standardize cliconf get_capabilities
* Check for capabilities before querying them
* Try to be more helpful when unexpected things are found in get_capabilities
* Add flags param to get_config for compatibility
* Remove raw byte-strings from cliconf plugins of supported platforms + edgeos
Remove uses of to_bytes, too
* Update CliConfBase docstring to reflect current position on byte strings
This commit fixes up the get_config method to match the minimum method
signature as defined by the base class. Without this patch, the
get_config method calls will fail in some cirumstances.