std.uuid: Update 1

[Johannes Pfau]

Am Sat, 09 Jun 2012 21:30:57 +0400
schrieb Dmitry Olshansky <dmitry.olsh at gmail.com>:
> Code: https://github.com/jpf91/phobos/blob/std.uuid/std/uuid.d
> API-Docs: http://dl.dropbox.com/u/24218791/d/src/uuid.html

I pushed these changes suggested by Dmitry Olshansky and Jonas Drewsen:

* Add documentation table
* Rename UUID.isNil --> UUID.empty
* Merge ParserException and IsufficientInputException into
  UUIDParserException
* Add note about std.variant.Variant
* Rewrite example to avoid cast
* Add non-working(commented out) variadic constructor
* Rename extractRegex --> uuidRegex
* Use std.algorithm.swap instead of swapRanges

Both the source file and the documentation have been updated.