0.7.4 - Citadel

New/updated endpoints:

• Added Char.clones and Char.skills
  • These endpoints are strict subsets of the character sheet endpoint, and use the same keys as the data in the character sheet result dictionary, just with a subset of the data.

Other changes

• Added support for SSO token authentication
  • To use an SSO auth token, pass a tuple of (token, type) to the sso_token parameter of an API object.
  • The 'type' portion of the tuple should be either 'character' or 'corporation'.
  • Currently we don't support omitting the token type.
  • If both api_key and sso_token arguments are specified, the SSO token will be used and the API key will be ignored.