Add COSPAD to QMK and add functions to read HSV (#2156)

* Added functions to read HSV values

I have added three functions to rgb_light.c to be able to read the hue, saturation and value from other places.
They are rgblight_get_hue(), rgblight_get_sat(), adn rgblight_get_val().

* Create keymap.c

* Add COSPAD support to QMK

I have ported the COSPAD numpad to qmk.

* Update readme.md

* Update cospad.c

keyboards/cospad/cospad.c

@@ -0,0 +1,37 @@
+#include "cospad.h"
+#include "led.h"
+
+extern inline void cospad_bl_led_on(void);
+extern inline void cospad_bl_led_off(void);
+extern inline void cospad_bl_led_togg(void);
+
+void matrix_init_kb(void) {
+	// put your keyboard start-up code here
+	// runs once when the firmware starts up
+	matrix_init_user();
+	led_init_ports();
+};
+
+void matrix_scan_kb(void) {
+	// put your looping keyboard code here
+	// runs every cycle (a lot)
+	matrix_scan_user();
+};
+
+void led_init_ports(void) {
+    // * Set our LED pins as output
+    DDRB |= (1<<2);
+    DDRF |= (1<<7);
+    // * Setting BL LEDs to init as off
+    PORTF |= (1<<7);
+}
+
+void led_set_kb(uint8_t usb_led) {
+    if (usb_led & (1<<USB_LED_NUM_LOCK)) {
+        // Turn numlock on
+        PORTB &= ~(1<<2);
+    } else {
+        // Turn numlock off
+        PORTB |= (1<<2);
+    }    
+}