add degrees

docs/lib3x-degrees.md

@@ -0,0 +1,15 @@
+# degrees
+
+Converts a radian measurement to the corresponding value in degrees.
+
+**Since:**: 3.0
+
+## Parameters
+
+- `radians` : The radians value.
+
+## Examples
+		
+	use <util/degrees.scad>;
+		
+	assert(degrees(PI) == 180);