Url::setPath() prepends missing '/'
Url::canonicalize() fixed
RequestFactory: removed $url->canonicalize()
RequestFactory: removed support for ORIG_PATH_INFO used by old IIS (BC break)
RequestFactory: script path is not detected from DOCUMENT_ROOT & SCRIPT_FILENAME (BC break)
tests: added test for RequestFactory
RequestFactory: script path detection is case-sensitive (BC break)
RequestFactory: optimized script path detection performance, thx @JanTvrdik [Closes #35]
RequestFactory: query is always taken from REQUEST_URI

In test was \x00 replaced with \x01 because of http_build_query limitation.
Url: internally stores query as an array, added getQueryParameters()
Request: $query is deprecated, parameters are taken form $url (BC break)