Handle cases when page redirects (via meta tag or js) without loading all resources. Fix GH-47.
Fixed handling of non-ascii urls. Thanks @tpeng for the bug report.

This commit assumes clients send utf8 GET arguments to splash.
Previously urls were implicitly decoded from latin1 by implicit QString constructor.
Merge branch 'master' into request-filters-and-logging

Conflicts:
	splash/qtrender.py