UNICODE support and fixed a bug where top level imports did noit work

bin/math.slime

@@ -1,17 +1,21 @@
 (define-module math
   :imports ("oo.slime")
-  :exports (pi abs sqrt make-vector3)
+  :exports (pi tau abs sqrt make-vector3)
 
   (define pi
-    :doc "Tha famous circle constant."
+    "The famous circle constant."
     3.14159265)
 
+  (define tau
+    "The second famous circle constant."
+    (* 2 pi))
+
   (define (abs x)
-    :doc "Accepts one argument and returns the absoulte value of it"
+    "Accepts one argument and returns the absoulte value of it"
     (if (> x 0) x (- x)))
 
   (define (sqrt x)
-    :doc "Accepts one argument and returns the square root of it"
+    "Accepts one argument and returns the square root of it"
     (** x 0.5))
 
   (define-class (vector3 x y z)