Fixed up some tests and wrote some documentation.

Also, .swp files are now ignored.

tests/vector.rs

@@ -1,13 +1,12 @@
 extern crate sigils;
 
-use sigils::Vector;
+use sigils::vector::*;
 
 
 #[test]
 fn vector_creation()
 {
-   let v: Vector<f32>;
+   let v: Vector3<f32> = Vector3::<f32>::from_value(1.0f32);
 
-   v = Vector::new();
    assert_eq!(v.x, 1.0f32);
 }