Refactor to use message.py, in preparation for supporting message-only validation, as well as request message checks.
message_check -> message
part two of message_check -> message
Make StatusChecker capable of evaluating a response in isolation.
Line wrapping
Update README for recent changes.
Make cache checks applicable to a response in isolation.
spacing
cleanup
Move subrequest to resource/active_check
Reformat; fix status check in content-range.
Fix HTML sample storage
Update copyright dates; consolidate __version__
fix Location
droid.py -> resource/__init__.py
ResourceExpertDroid -> HttpResource
Move more code into HttpResource; renaming.