Add tasks for all the new languages

Task/Classes/LFE/classes-1.lfe

@@ -0,0 +1,31 @@
+(defmodule simple-object
+  (export all))
+
+(defun fish-class (species)
+  "
+  This is the constructor used internally, once the children and fish id are
+  known.
+  "
+  (let ((habitat '"water"))
+    (lambda (method-name)
+      (case method-name
+        ('habitat
+          (lambda (self) habitat))
+        ('species
+          (lambda (self) species))))))
+
+(defun get-method (object method-name)
+  "
+  This is a generic function, used to call into the given object (class
+  instance).
+  "
+  (funcall object method-name))
+
+; define object methods
+(defun get-habitat (object)
+  "Get a variable set in the class."
+  (funcall (get-method object 'habitat) object))
+
+(defun get-species (object)
+  "Get a variable passed when constructing the object."
+  (funcall (get-method object 'species) object))

Task/Classes/LFE/classes-2.lfe

@@ -0,0 +1,8 @@
+> (slurp '"simple-object.lfe")
+#(ok simple-object)
+> (set my-fish (fish-class '"Carp"))
+#Fun<lfe_eval.10.91765564>
+> (get-habitat my-fish)
+"water"
+> (get-species my-fish)
+"Carp"