Merge branch 'Development' into marlin_configurator

Latest upstream changes

Documentation/GCodes.md

 *  M908 - Control digital trimpot directly.
 *  M928 - Start SD logging (M928 filename.g) - ended by M29
 *  M999 - Restart after being stopped by error
+
+# Comments
+
+Comments start at a `;` (semicolon) and end with the end of the line:
+
+    N3 T0*57 ; This is a comment
+    N4 G92 E0*67
+    ; So is this
+    N5 G28*22
+
+(example taken from the [RepRap wiki](http://reprap.org/wiki/Gcode#Comments))
+
+If you need to use a literal `;` somewhere (for example within `M117`), you can escape semicolons with a `\`
+(backslash):
+
+     M117 Hello \;)
+
+`\` can also be used to escape `\` itself, if you need a literal `\` in front of a `;`:
+
+    M117 backslash: \\;and a comment
+
+Please note that hosts should strip any comments before sending GCODE to the printer in order to save bandwidth.

Marlin/language.h

 #define MSG_PID_TIMEOUT                     MSG_PID_AUTOTUNE_FAILED " timeout"
 #define MSG_BIAS                            " bias: "
 #define MSG_D                               " d: "
-#define MSG_MIN                             " min: "
-#define MSG_MAX                             " max: "
+#define MSG_T_MIN                           " min: "
+#define MSG_T_MAX                           " max: "
 #define MSG_KU                              " Ku: "
 #define MSG_TU                              " Tu: "
 #define MSG_CLASSIC_PID                     " Classic PID "
     #define STR_h3 "3"
     #define STR_Deg "\271"
     #define STR_THERMOMETER "\002"
-  #endif
-  #ifdef DISPLAY_CHARSET_HD44780_WESTERN // HD44780 ROM Code: A02 (Western)
+  #elif defined(DISPLAY_CHARSET_HD44780_WESTERN) // HD44780 ROM Code: A02 (Western)
     #define STR_Ae "\216"
     #define STR_ae "\204"
     #define STR_Oe "\211"
     #define STR_h3 "\263"
     #define STR_Deg "\337"
     #define STR_THERMOMETER "\002"
+  #elif defined(ULTRA_LCD)
+    #error You must enable either DISPLAY_CHARSET_HD44780_JAPAN or DISPLAY_CHARSET_HD44780_WESTERN for your LCD controller.
   #endif
 #endif
 /*

Marlin/temperature.cpp

 
             SERIAL_PROTOCOLPGM(MSG_BIAS); SERIAL_PROTOCOL(bias);
             SERIAL_PROTOCOLPGM(MSG_D);    SERIAL_PROTOCOL(d);
-            SERIAL_PROTOCOLPGM(MSG_MIN);  SERIAL_PROTOCOL(min);
-            SERIAL_PROTOCOLPGM(MSG_MAX);  SERIAL_PROTOCOLLN(max);
+            SERIAL_PROTOCOLPGM(MSG_T_MIN);  SERIAL_PROTOCOL(min);
+            SERIAL_PROTOCOLPGM(MSG_T_MAX);  SERIAL_PROTOCOLLN(max);
             if (cycles > 2) {
               Ku = (4.0 * d) / (3.14159265 * (max - min) / 2.0);
               Tu = ((float)(t_low + t_high) / 1000.0);

README.md

 
  - Erik van der Zalm ([@ErikZalm](https://github.com/ErikZalm))
  - [@daid](https://github.com/daid)
- 
+
 Sprinters lead developers are Kliment and caru.
 Grbls lead developer is Simen Svale Skogsrud.
 Sonney Jeon (Chamnit) improved some parts of grbl
   - Bradley Feldman,
   - and others...
 
-## Licence
+## License
 
-Marlin is published unde the [GPL license](/Documentation/COPYING.md) because I believe in open development.
+Marlin is published under the [GPL license](/Documentation/COPYING.md) because I believe in open development.
 Please do not use this code in products (3D printers, CNC etc) that are closed source or are crippled by a patent.
 
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