Fallback since older versions of Tornado can't handle max_hader_size
Adding ordereddict dependency to debian/control
Merge pull request #417 from freider/ordereddict

Adding ordereddict dependency to debian/control
Merge pull request #413 from spotify/erikbern/max-header-size-fallback

Fallback since older versions of Tornado can't handle max_hader_size
Switch to using POST for RPC requests.
Fallback to GET if scheduler doesn't support POST.
Remove GET request size workaround.