Added cabal and vim dir

cabal/share/x86_64-osx-ghc-7.8.4/zepto-0.6.3/stdlib/delay.scm

@@ -0,0 +1,24 @@
+;; All implementations here are "borrowed" from 
+;; husk-scheme (github.com/justinethier/husk-scheme).
+(define force
+    (lambda (object)
+        (object)))
+
+(define-syntax delay
+    (syntax-rules ()
+        ((delay expression)
+            (make-promise (lambda () expression)))))
+            
+(define make-promise
+    (lambda (proc)
+        (let ((result-ready? #f)
+                (result #f))
+            (lambda ()
+                (if result-ready?
+                    result
+                (let ((x (proc)))
+                    (if result-ready?
+                        result
+                    (begin (set! result x)
+                        (set! result-ready? #t)
+                            result))))))))