Added Debug, Display, and Default to Vectors and Quaternions.

This also adds an example for Vectors and Quaternions.

examples/quaternion.rs

@@ -0,0 +1,14 @@
+extern crate sigils;
+
+
+
+use sigils::quaternion::{Quaternion};
+
+
+pub fn main()
+{
+   let quat: Quaternion<f64>;
+
+   quat = Quaternion::<f64>::default();
+   println!("Quaternion: {}", quat);
+}

examples/vector.rs

@@ -0,0 +1,22 @@
+extern crate sigils;
+
+
+
+use sigils::vector::{Vector2, Vector3, Vector4};
+
+
+pub fn main()
+{
+   let vec2: Vector2<f64>;
+   let vec3: Vector3<f64>;
+   let vec4: Vector4<f64>;
+
+   vec2 = Vector2::<f64>::default();
+   println!("Vector2: {}", vec2);
+
+   vec3 = Vector3::<f64>::default();
+   println!("Vector3: {}", vec3);
+
+   vec4 = Vector4::<f64>::default();
+   println!("Vector4: {}", vec4);
+}