Start testing node 0.11
Whitespace cleanup
Reformat markdown for better readability

- rawgithub.com → rawgit.com
- reflow to 80 characters
- remove manually created anchors; GitHub creates them now
- change <img> tags to markdown tags
Remove shims for obsolete browsers, fixes #98

Users wishing to support older browsers (like IE 8, for example) will need to
shim `Array.isArray` and `Array.prototype.filter` themselves.
[fix] fix undefined fns.captures in async mode

Fixes #183 and #187.
[fix] add missing path() method to browser build

Fixes #176.
[fix] fix path.resolve crash in html5 test backend

Using fix from #237.

Also tabs → spaces.
[build] version bump, new browser build