Spindle/coolant rare bug fixes. Free more flash.

[new] Altered the way default settings are stored and restored. Saved about 300 bytes(!) of flashed size. Should free up enough for certain configurations of CoreXY machines.

[fix] When the optional M7 mist coolant IO was enabled, coolant overrides was not disabling correctly.

[fix] Coolant override states was not restored correctly after a parking motion in certain situations. It would restore programmed state, rather than current overridden state.

[fix] Now allow coolant overrides to operate during jogging motion.

[fix] Invert control pin mask typo.

[new] Added a new build info feedback mechanism for enabling the safety door input pin.

doc/csv/build_option_codes_en_US.csv

@@ -1,21 +1,22 @@
-"OPT: Code"," Build-Option Description","State"
-"V","Variable spindle","Enabled"
-"N","Line numbers","Enabled"
-"M","Mist coolant M7","Enabled"
-"C","CoreXY","Enabled"
-"P","Parking motion","Enabled"
-"Z","Homing force origin","Enabled"
-"H","Homing single axis commands","Enabled"
-"T","Two limit switches on axis","Enabled"
-"A","Allow feed rate overrides in probe cycles","Enabled"
-"D","Use spindle direction as enable pin","Enabled"
-"0","Spindle enable off when speed is zero","Enabled"
-"S","Software limit pin debouncing","Enabled"
-"R","Parking override control","Enabled"
-"*","Restore all EEPROM command","Disabled"
-"$","Restore EEPROM `$` settings command","Disabled"
-"#","Restore EEPROM parameter data command","Disabled"
-"I","Build info write user string command","Disabled"
-"E","Force sync upon EEPROM write","Disabled"
-"W","Force sync upon work coordinate offset change","Disabled"
-"L","Homing initialization auto-lock","Disabled"
+OPT: Code, Build-Option Description,State
+V,Variable spindle,Enabled
+N,Line numbers,Enabled
+M,Mist coolant M7,Enabled
+C,CoreXY,Enabled
+P,Parking motion,Enabled
+Z,Homing force origin,Enabled
+H,Homing single axis commands,Enabled
+T,Two limit switches on axis,Enabled
+A,Allow feed rate overrides in probe cycles,Enabled
+D,Use spindle direction as enable pin,Enabled
+0,Spindle enable off when speed is zero,Enabled
+S,Software limit pin debouncing,Enabled
+R,Parking override control,Enabled
++,Safety door input pin,Enabled
+*,Restore all EEPROM command,Disabled
+$,Restore EEPROM `$` settings command,Disabled
+#,Restore EEPROM parameter data command,Disabled
+I,Build info write user string command,Disabled
+E,Force sync upon EEPROM write,Disabled
+W,Force sync upon work coordinate offset change,Disabled
+L,Homing initialization auto-lock,Disabled

doc/log/commit_log_v1.1.txt

@@ -1,3 +1,30 @@
+----------------
+Date: 2018-06-09
+Author: Jon
+Subject: Fix apparent error in restore masking that causes the call to coolant_set_state to not re-enable the mist (M7) output if it was previously enabled. (#469)
+
+
+
+----------------
+Date: 2018-04-06
+Author: Sonny Jeon
+Subject: Updated instructions in fit_nonlinear_spindle.py
+
+- repl.it has changed since the last time fit_nonlinear_spindle.py was tested. Updated instructions.
+
+
+----------------
+Date: 2017-08-01
+Author: Sonny Jeon
+Subject: Improved fix for rare lowering feed/rapid override bug.
+
+[fix] In the previous hot fix, there was still (rarer) potential for
+very small floating point errors incorrectly handle an override
+deceleration and crash Grbl. Re-factored the if-then statement in terms
+of speed changes, rather than distance, to completely eliminate the
+issue.
+
+
 ----------------
 Date: 2017-07-31
 Author: Sonny Jeon

doc/markdown/interface.md

@@ -433,6 +433,7 @@ Feedback messages provide non-critical information on what Grbl is doing, what i
 | **`S`** | Software limit pin debouncing enabled |
 | **`R`** | Parking override control enabled |
 | **`A`** | Allow feed rate overrides in probe cycles |
+| **`+`** | Safety door input pin enabled |
 | **`*`** | Restore all EEPROM disabled |
 | **`$`** | Restore EEPROM `$` settings disabled |
 | **`#`** | Restore EEPROM parameter data disabled |