encode_utils

New Features:
-Added dry-run mode (#6). See examples on RTD.
-The Connection class can be instantiated with a custom host, i.e. a demo host (@hitz , #1)
-The DCC API keys are no longer required for using the Connection class. Useful for folks who just need to do search or get requests. (@hitz , #1)
-The call to the get() method in Connection.patch() now sets the argument frame=object, rather than the default frame of page, which is a significant speedup (@hitz , #7).

Other:
-Ran autopep8.py on the codebase to format according to PEP8 (@hitz #2).
-Documentation updates on RTD.