Helpful to be able to disable echo when sending commands fast, so that
the editor can consume them fast than they arrive. This adds 'echo-on'
and 'echo-off' commands to set the echo state.
* Sysparam implementation
sysparam improvements
Mostly done, a few minor cleanups left.
Add sysparam_editor example
Sysparam code cleanup
Add documentation to sysparam.h
Fix up sysparam.h docs
Added a couple more debug statements
Fix potential memory leak if realloc() fails
Major sysparam overhaul
Add sysparam_get_info function
Add sysparam initialization to app_main.c
* Fixed warnings, added license