Add knops mini info json and implemented latest QMK standards (#2832)

* added info.json to knops mini keypad.

* updated the keyboard to follow the latest qmk standards.

keyboards/knops/mini/info.json

@@ -0,0 +1,13 @@
+{
+	"keyboard_name": "Knops Mini",
+	"url": "http://www.knops.io/knopsmini.html",
+	"maintainer": "Pawnerd",
+	"bootloader": "lufa-dfu",
+	"width": 3,
+	"height": 2,
+	"layouts": {
+		"KEYMAP": {
+			"layout": [{"x":0, "y":0}, {"x":1, "y":0}, {"x":2, "y":0}, {"x":0, "y":1}, {"x":1, "y":1}, {"x":2, "y":1}]
+		}
+	}
+}