Release v1.1.0

Added:

• Support Python 3.7, PR-53
• Client.get_full_info() to get full information about a
  bucket, pr-55
• Implement token API for Reduct Storage API v1.1, PR-56

Changed:

• Client.get_bucket now uses GET instead of HEAD in order to be able to return a meaningful error to the
  user, PR-51
• Client class now catches parsing errors raised by incorrect server configurations or missing
  servers, PR-52

Fixed:

• Fix examples in docstrings, PR-54