v1.1.0

Changelog:

• added support of passing promises objects which will be resolved with
  pre-connected db object in options.db;
• fixed issue when events logged sometime between authorizeDb and
  processOpQuery calls may be lost;
• renamed default log collection to 'log' because it makes more sense than
  'logs' ('log' is a list of messages already, plural form would imply
  multiple of such lists).