- add .gitignore
- add COPYING
- name :licence in the asdf system
- respect 80 char line limit everywhere
- add trivial-utf-8/doc system to generate mgl-pax docs
- generate README and README.md
- tweak docstrings

It's just micro-optimizations: a couple of inline declarations,
and a quicker test for group size 1.

On CLL and Clisp, also on x86-64, it's about 2% and 5% faster,
respectively.

Ignore-this: 2668c60f65d62142c92a416de6f16645

A code point like #x0800, which exactly fits in 3 bytes, would be
rejected because a > was used where >= was needed.

darcs-hash:0c7a13b626f7c9b11412821050e8e0666a209b6b

Ignore-this: 1e567a57541da1dd8de04d9c4fbd3a55

darcs-hash:5b94fcc7a324f681d618cc22fbfd352fb593e151

darcs-hash:68c891ccf0848ed95aa06bd0af469c9fc790ba58

use coerce for string->simple-string and vector->(simple-array (unsigned-byte 8)), so that people passing in other types won't get weird errors on SBCL

darcs-hash:c01e4e1b990969f37d73d96476e6ce42e7a74ade

darcs-hash:dee1758d7a8a741a3c4e4b75ed33dd8b44c90d56

darcs-hash:441c0ce2d59e324754a2ea52d9967d120b9ecafc

darcs-hash:cc2d08c7a5c123ca09f682f66470b4ed7270010d

read-utf-8-string: avoiding NIL fixnum, utf-8-bytes-to-string: (make-string ... :element-type 'character)

darcs-hash:92b65be28c0ad2df8462af645473be6d8c3b491d

darcs-hash:ad4c86436ab1e8e6fccfb7f4c29f1cd6f9055bf9