Support for anchor tag - currently pollutes results

Love the library. Very simple to use. Did run into issues with anchors. if they are on the path then they leak into the produced results.

`(def routes [["/" :root] ["/:id" :root-with-id]])`
`(def my-router (r/router routes))`
`(r/match my-router "/") ; [:root nil nil]`
`(r/match my-router "/?a=1") ; [:root nil {:a "1"}]`
`(r/match my-router "/?a=1#asdf") ; [:root nil {:a "1#asdf"}]`
`(r/match my-router "/#asdf") ; [:root-with-id {:id "#asdf"} nil]`
`(r/match my-router "/my-id#asdf") ; [:root-with-id {:id "my-id#asdf"} nil]`
`(r/match my-router "/my-id?a=1#asdf") ; [:root-with-id {:id "my-id"} {:a "1#asdf"}]`