add support for balanced parens in query

[markevaul]

add support for query containing and ending in balanced parens such as http://www.example.com?q=(1,2)

[markevaul]

I'd like to add some test cases to the conformance tests as well

http://www.example.com?q=(1,2) => http://www.example.com?q=(1,2) (http://www.example.com?q=(1,2)) => http://www.example.com?q=(1,2)

[jakl]

Oh sweet, thanks!

[markevaul]

The only issue i can think of with this fix is that I removed '(' and ')' from valid query characters, meaning that only balanced parens in query will be allowed. I'm not sure if this is an issue or not, but there are no unit tests that have parens in the query, other than the ones I added.

[jakl]

That sounds fair since we're already into balancing parens.

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