Update to 5.26

Upstream changes:
5.26  2014-08-09
  - Improved WebSocket performance.
  - Fixed proxy exception handling bug in Mojo::UserAgent.
  - Fixed bug where Mojo::Transaction::WebSocket would build incorrect frames
    if the FIN bit was not set.

5.25  2014-08-07
  - Added reduce method to Mojo::Collection. (sri, batman)
  - Added if_none_match method to Mojo::Headers.
  - Added is_fresh method to Mojolicious::Static.
  - Added is_fresh helper to Mojolicious::Plugin::DefaultHelpers.
  - Improved Mojolicious to use MyApp::Controller namespace by default and
    encourage its use in the documentation.
  - Improved sort method in Mojo::Collection to use $a and $b. (batman)
  - Improved Mojolicious::Static to support ETag and If-None-Match headers.
  - Improved documentation browser CSS.
  - Fixed escaping bugs in Mojo::DOM::CSS.

(wen)