Pin state reporting of all pins. Flash optimization.

- New pin state realtime reporting feature. Instead of `Lim:000` for
limit state reports, the new feature shows `Pin:000|0|0000`, or
something similar. The `|` delimited fields indicate xyz limits, probe,
and control pin states, where 0 is always not triggered, and 1 is
triggered. Invert masks ARE accounted for.
  Each field may be enabled or disabled via the `$10` status report
setting. The probe and control pin flags are bits 5 and 6, respectively.

- Remove the now deprecated `REPORT_CONTROL_PIN_STATE` option in
config.h

- The old limit pin reports `Lim:000` may be re-enabled by commenting
out `REPORT_ALL_PIN_STATES` in config.h.

- Incremented the version letter (v1.0c) to indicate the change in
reporting style.

- Replaced all bit_true_atomic and bit_false_atomic macros with
function calls. This saved a couple hundred bytes of flash.

grbl/settings.h

@@ -45,6 +45,8 @@
 #define BITFLAG_RT_STATUS_PLANNER_BUFFER    bit(2)
 #define BITFLAG_RT_STATUS_SERIAL_RX         bit(3)
 #define BITFLAG_RT_STATUS_LIMIT_PINS        bit(4)
+#define BITFLAG_RT_STATUS_PROBE_PIN         bit(5)
+#define BITFLAG_RT_STATUS_CONTROL_PINS      bit(6)
 
 // Define settings restore bitflags.
 #define SETTINGS_RESTORE_ALL 0xFF // All bitflags