fixes and tests for 316 and 314
pep8
attempting to test userena support
userena testing working :)
pep8ify
trying to get docs to work
added docs folders
pep
fixed more tests
fixed tests
pep8
more docs changes
bumped the version to 5.1.3
refactor get_class_from_string so it doesn't swallow ImportErrors
Merge pull request #318 from pterk/master

Stop eating ImportError
added peters change
Add documentation for canvas middleware
improve middleware explanation
use exceptions for missing signed_request
refactor check for permissions to use exception when some is missing
add canvas app docs in main readme
Merge pull request #319 from duduklein/canvas-doc

Add documentation for canvas middleware
pep8
bump