(WIP) Started on pointing to new API
Remove unused parameters
[issue-27] Different caches for different retinas
Support retinas with different sizes (fixes #11)
Handle errors gracefully (fixes #12)
Switch to CEPT endpoint for Numenta that supports tokenization. Adds tokenize method.
Adds unit tests for the tokenize function but the unit tests aren't set up correctly so can't actually be run.
Updates to new API.
Merge pull request #14 from scottpurdy/issue28

Adds tokenize method