Internal (WSF): Updated response notes and creations.

* Updated class-level documentation in the Notes clause of the class.
* Added feature comments and updated argument and local names.

NOTE: Using the a_* for arguments and l_* for locals (except iteration
indexes). Attachment locals and across iteration cursors (if any) are
updated to al_* for "attachment local" and "ic_*" for iteration_cursor
for readability. Also, documentation now includes standard sections for
What, Why, How, and BNF as well as BNF "Informative Text" (see ECMA-367
for sample usage for comparison).