swift234

Fix a bunch of minor bugs found through inspection:

1. Punctuation identifiers were missing some characters.
2. Some parser production and methods were misnamed.
3. Top level var decls don't need a ; after them.
4. Various parser comments were out of date.
5. We now allow any type in a struct decl, e.g. "struct foo int", even though it's weird.

Swift SVN r199