Merge pull request #1 from calebgroom/master

Remove get_protocols and minor pep8 cleanup.
Simple API Fix

- the contract changed
- this is a simple fix that seems to work. No testing!
Merge pull request #2 from ziadsawalha/master

Simple Fix for Contract Change
Added optional users paramater to create_instance call.
Added sample of create_instance with users.
Merge pull request #4 from ccobbster/master

Added optional users paramater to create_instance call.
Always specify an Accept header