Added the get-vanilla-ut8-query and post-vanilla-query-space tests from the current official Signature Version 4 Test Suite (http://docs.aws.amazon.com/general/latest/gr/signature-v4-test-suite.html); note this brings the test suite up to date, except that I've excluded the incomplete get-header-value-multiline.req test, and the serverely-broken post-vanilla-query-nonunreserved test.
Merge remote-tracking branch 'pcolby/new-offical-v4-tests'
Removing failing UTF-8 test that breaks due to an issue with PHP's parse_url