Human Error only runs on Ruby 2.x
Errors should be able to convert themselves to JSON
Extract Knowledgebase ID into KnowledgebaseIdDirectory similarly to how we did the ErrorCodeDirectory
Since the customer support URI now depends exclusively on items in HumanError::Error, we can move it up
Add Apill::Errors::InvalidApiRequestError to the ErrorCodeDirectory
Add errors.rb to load all the errors files
Version Bump to 1.1.0