2.0.3

• RUBY-889: Only use ssl options if :ssl is true
• RUBY-890: Fix authentication sources and slight auth refactor.
• RUBY-892: Don't raise an error if a non-existent collection is dropped.
• RUBY-895: Raise error for malformed queries and don't send to the server.
• RUBY-897: Print first 250 chars of query selector when logging and rescue inspect error.
• RUBY-899: Cluster returns empty list of servers if there are none instead of nil.
• RUBY-891: Topology refactor to use Single naming and semantics.
• Auto test patched ruby versions on Travis (@nicolasleger)
• Update collection namespace to show database first (@max-power)
• Updates so test suite can run using SSL in Jenkins
• Use #getaddrinfo to determine protocol in Address class
• URI errors moved to appropriate directory