New alarm method. Re(re)organized status messages.

- Installed a new 'alarm' method to centralize motion kills across
alarm or reset events. Right now, this is controlled by system abort
and hard limits. But, in the future, a g-code parser error may call
this too as a safety feature.

- Re(re)organized status messages to just print all errors, regardless
from where it was called. This centralizes them into one place.

- Misc messages method installed for any user feedback that is not a
confirmation or error. Mainly so that there is a place to perform
warnings and such.

- New stuff installed and still made the flash size smaller by saving
flash space from clearing out repeated '\r\n' pgmstrings.

- Fixed a bug where hard limits message would print everytime a system
abort was sent.

stepper.c

@@ -113,7 +113,7 @@ void st_go_idle()
   // Force stepper dwell to lock axes for a defined amount of time to ensure the axes come to a complete
   // stop and not drift from residual inertial forces at the end of the last movement.
   delay_ms(settings.stepper_idle_lock_time);
-  // Disable steppers only upon system alarm activated or by user setting to keep enabled.
+  // Disable steppers only upon system alarm activated or by user setting to not be kept enabled.
   if ((settings.stepper_idle_lock_time != 0xff) || bit_istrue(sys.execute,EXEC_ALARM)) {
     STEPPERS_DISABLE_PORT |= (1<<STEPPERS_DISABLE_BIT);
   }