Two small things...

[Sam Ruby]

I'm starting to experiment with implementing OpenID using Ruby on Rails.
 Two small things I've noticed that probably should be noted in the
documentation.

1) btwoc(128) => [0,128], not [128] which otherwise would seem to be the
"shortest big-endian two's complement notation", lest the high order bit
be interpreted as a sign bit.  This may be obvious to some, but it
initially wasn't obvious to me.

2) some base64 libraries add some "courtesy" newlines.  These need to be
removed.  This *was* obvious to me, but wasn't something I was initially
looking out for.

- Sam Ruby