Added cabal and vim dir

cabal/share/x86_64-osx-ghc-7.8.4/zepto-0.5.3/stdlib/random.scm

@@ -0,0 +1,16 @@
+;; This code is taken from:
+;; http://stackoverflow.com/questions/14674165/scheme-generate-random
+;; It is not to be used in cryptography or related fields.
+(define (random) "generates a random number between 0 and 1"
+  (let ((a 69069) (c 1) (m (expt 2 32)) (seed 19380110.0))
+    (lambda new-seed
+      (if (pair? new-seed)
+        (begin (set! seed (car new-seed)))
+        (begin (set! seed (modulo (+ (* seed a) c) m))))
+      (/ seed m))))
+
+(define (randint . args) "generate a random integer between the given args(the lower range is optional)"
+  (cond ((= (length args) 1) (randint 0 (car args)))
+        ((= (length args) 2)
+         (+ (car args) (floor (* (random) (- (cadr args) (car args))))))
+        (else (write "usage: (randint [lo] hi)"))))