Added some todo items

TODO-0.1.txt

@@ -31,6 +31,7 @@ CODE
     * Go over sandbox and figure out what is still relevant
 
     * Make 'merge' optimizer the default (since math optimizer is broken)
+        * Update documentation accordingly
     * Rename 'merge' optimizer to 'simple' optimizer (and non-optimizer to
     'null')
         * Update documentation accordingly