first implementation of docgen2

todo.txt

@@ -1,6 +1,8 @@
 version 0.9.0
 =============
 
+- test new doc2 generator
+
 Debug GC session:
 - bug: stress testing basic method example (eval example) 
   without ``-d:release`` leaks memory?
@@ -13,7 +15,6 @@ New pragmas:
 - ``borrow`` needs to take type classes into account
 - make templates hygienic by default: try to gensym() everything in the 'block'
   of a template; find a better solution for gensym instead of `*ident`
-- ``bind`` for overloaded symbols does not work apparently
 - ``=`` should be overloadable; requires specialization for ``=``
 - fix remaining closure bugs:
   - make toplevel but in a scope vars local; make procs there inner procs
@@ -25,7 +26,7 @@ New pragmas:
 - unsigned ints and bignums; requires abstract integer literal type: 
   use tyInt+node for that
 - change how comments are part of the AST
-- extract nimdoc properly and document it finally
+- document nimdoc properly finally
 - rethink the syntax: distinction between expr and stmt is unfortunate; 
   indentation handling is quite complex too; problem with exception handling
   is that often the scope of ``try`` is wrong and apart from that ``try`` is
@@ -105,8 +106,7 @@ Low priority
 
 - ``with proc `+`(x, y: T): T`` for generic code
 - new feature: ``distinct T with operations``
-- find a way for easy constructors and destructors; (destructors are much more
-  important than constructors)
+- implement the "easy" constructors idea; document destructors
 - code generated for type information is wasteful
 - resizing of strings/sequences could take into account the memory that
   is allocated