Merge pull request #15 from nicholascloud/master

fixed broken require stmt due to case
Use util.isRegExp
Rename utils.makeKey => utils.makeToken
Update mach.token and docs
Add spec for pass-through case
Add note
Add headers module with Accept* headers
Simplify qvalue handling
Add accepts* methods to Request
Update CHANGES
Version 0.9.0
Ensure client accepts gzip encoding

Also, removed superfluous `test` option.
Update doc
Use ~ to specify dependencies
Make then-redis an optional dependency

Fixes #16
Update CHANGES
Version 0.9.1
Small tweaks
Use a real Error; rename some variables/methods
Small tweaks