minor commenting
implemented iterator and count for queues

Iterators can run across the queue in one dimension. Count is automatically
updated as elements are added or removes.
added comparisons for fixed width unsigned numbers
queue bug fix
Merge branch 'master' of ssh://rhea/var/git/shimtypes
fixed up avl joint tree
avl index tree fixes
simplified using inlined tree node
added missing avlj joint tree purge declaration
missing export attribute
improved type support of integers and functions
Merge branch 'master' of /var/git/shimtypes
added null lock
implemented void type, improved param types
implemented structure and pointer types
improved types
vastly improved types and values
refactored types