Escape query_strings in DSL

[tarzan]

i.e. get "/api/v1/find?query=:my_query" should escape :my_query

[tarzan]

I had a hard time writing a spec for this 'cause I couldn't get all specs to pass locally. Would like me to try harder?

[jessedijkstra]

@oestrich Any chance you take a look at this?

[oestrich]

Merged, locally. The failing test was the only test that was really needed since it specifically deal with that method.