Merge pull request #339 from untitaker/sprint-branch

My stuff
Fix issues with test_streaming_parse

This just solves errors with the test, it still doesn't pass due to
issues with the form parser.
Make test_get_current_url_unicode pass
Make make_line_iter operate on native strings

Previously it was inconsistently broken, now it is consistently broken
and produces more errors. That's not as bad as it sounds.
Make make_line_iter operate on unicode and bytes
Make make_chunk_iter work on bytes and unicode
Headers.linked doesn't exist anymore
Ouch...
Fixed some literals