Collision: Added C Src and Example

This module was initially known as GroveCollision. It has been
now changed to Collision. C source and examples added.

Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>

examples/c/collision.c

@@ -0,0 +1,22 @@
+//Modified: Abhishek Malik <abhishek.malik@intel.com>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "collision.h"
+
+int main()
+{
+	collision_context dev = collision_init(2);
+	bool abc = 0;
+	while(1){
+		if(collision_is_colliding(dev, &abc) != UPM_SUCCESS){
+			printf("an error has occured\n");
+		}
+		upm_delay(1);
+		printf("value retrieved: %d\n", abc);
+	}
+	collision_close(dev);
+}