- update to 2.3.1:
* Backwards compatability fix - connect should work with mandatory
routename and optional path. Patch by Davanum Srinivas (PR #65).
* Fix sub_domain equivalence check. Patch by Nikita Uvarov
* Add support for protocol-relative URLs generation (i.e. starting with double
slash ``//``). PR #60. Patch by Sviatoslav Sydorenko.
* Add support for the ``middleware`` extra requirement, making possible to
depend on ``webob`` optionally. PR #59. Patch by Sviatoslav Sydorenko.
* Fix matching of an empty string route, which led to exception in earlier
versions. PR #58. Patch by Sviatoslav Sydorenko.
* Add support for the ``requirements`` option when using
mapper.resource to create routes. PR #57. Patch by Sean Dague.
* Concatenation fix when using submappers with path prefixes. Multiple
submappers combined the path prefix inside the controller argument in
non-obvious ways. The controller argument will now be properly carried
through when using submappers. PR #28.