Add definition Printrbot Simple by Calvindog717

Source: https://www.reddit.com/r/3Dprinting/comments/4n1lyd/cura_212_has_been_released_it_features_major_ui/d409udf
I've converted Calvin's profile that he was using personally to be up to date after the settings rework.

resources/definitions/printrbot_simple.def.json

@@ -0,0 +1,41 @@
+{
+    "id": "printrbot_simple",
+    "version": 2, 
+    "name": "Printrbot Simple",
+    "inherits": "fdmprinter",
+    "metadata": {
+        "visible": true,
+        "author": "Calvindog717",
+        "manufacturer": "PrintrBot",
+        "file_formats": "text/x-gcode"
+    },
+
+    "overrides": {
+        "machine_heated_bed": { "default_value": false },
+        "machine_width": { "default_value": 150 },
+        "machine_height": { "default_value": 150 },
+        "machine_depth": { "default_value": 140 },
+        "machine_center_is_zero": { "default_value": false },
+        "machine_nozzle_size": { "default_value": 0.3 },
+        "material_diameter": { "default_value": 1.75 },
+        "machine_nozzle_heat_up_speed": { "default_value": 2 },
+        "machine_nozzle_cool_down_speed": { "default_value": 2 },
+        "machine_head_with_fans_polygon": {
+            "default_value": [
+                [ -3, 3 ],
+                [ -3, -3 ],
+                [ 3, -3 ],
+                [ 3, 3 ]
+            ]
+        },
+        "gantry_height": { "default_value": 15 },
+        "machine_gcode_flavor": { "default_value": "RepRap (Marlin/Sprinter)" },
+
+        "machine_start_gcode": {
+            "default_value": "G21 ;metric values\nG90 ;absolute positioning\nM82 ;set extruder to absolute mode\nM107 ;start with the fan off\nG28 X0 Y0 ;move X/Y to min endstops\nG28 Z0 ;move Z to min endstops\nG29 ; auto bed-levelling\nG1 Z15.0 F9000 ;move the platform down 15mm\nG92 E0 ;zero the extruded length\nG1 F200 E3 ;extrude 3mm of feed stock\nG92 E0 ;zero the extruded length again\nG1 F9000\n;Put printing message on LCD screen\nM117 Printing..."
+        },
+        "machine_end_gcode": {
+            "default_value": "M104 S0 ;extruder heater off\nM140 S0 ;heated bed heater off (if you have it)\nG91 ;relative positioning\nG1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\nG1 Z+0.5 E-5 X-20 Y-20 F9000 ;move Z up a bit and retract filament even more\nG28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\nM84 ;steppers off\nG90 ;absolute positioning"
+        }
+    }
+}