v0.3.0: Canvas support for pagination.

• Canvas page, quantity, and all pagination support
• Catalog page, quantity, and all pagination support

v0.2.3

• Correct pip command (pip->pip2)

v0.2.2

v0.2.2

v0.2.1

• forgot to commit downloading for commons

v0.2

• Support for downloading files from Canvas, Commons, and Bridge
• Destroy sessions on exit for Arc and Commons
• Robust help documentation
• probably broke some other stuff

v0.1

update arc readme