renamed prog to begin and added basics for the manual

todo.org

@@ -1,6 +1,7 @@
 * TODO rename slime to plisk
 * TODO go through sicp and use the examples as test files
 * TODO test macro expanding to macro
+* TODO create global environment- and callstack
 * TODO BUG 1: eval dot notation
 #+BEGIN_SRC lisp
   (eval `(+ . ,(list 1 2 3)))
@@ -10,7 +11,7 @@
 
 * TODO BUG 2: eval dot notation
 #+BEGIN_SRC lisp
-  (prog
+  (begin
    (define a (list 1 2 3))
    (eval `(+ . ,a)))
   ;; should output 6