Starting a 0.9.1 release for bugfixes
Fixed issues with url quoting and integers.

- url_quote now no longer casts an integer to a bytearray but
  instead takes any non string looking value through text_type().
- the routing system no longer attempts to convert values to
  bytes before passing it to bytes solving type errors on non
  string url generations.
Fixed a bug with url_quote() not quoting single digit codepoints correctly.
Merge branch '0.9-maintenance'