API Updated, bugs fixed, version bumped.

After some great pull-requests from @mathiasbynens, the version has been updated to v1.0.4 with the following features:

• added `toString' to the public API which will return the RegExp as a string
• renamed regex to toRegExp (and deprecated regex) so it more closely matches ECMAScript naming conventions
• escaping of non-ASCII symbols is now handles correctly
• REAME updated to fix incorrect statements regarding JavaScript's coercion of numbers to strings.

Thanks to @mathiasbynens for all of the above fixes!