documentation improvements

todo.txt

@@ -1,9 +1,6 @@
 version 0.9.0
 =============
 
-- document AVR/embedded systems better; document all the ``useX`` conditional
-  symbols for the stdlib
-- implement ``--script:sh|bat`` command line option
 - make GC realtime capable: GC_step(ms: int)
 - make templates hygienic by default
 - ``=`` should be overloadable; requires specialization for ``=``
@@ -133,6 +130,8 @@ Low priority
   --> solve by implicit conversion from varargs to openarray
 - implement closures that support nesting > 1
 - optimize method dispatchers
+- implement ``--script:sh|bat`` command line option; think about script 
+  generation
 
 
 Further optimization ideas