Bug fixes for Camel 2.5, Camel 2.9 and header-based routing keys

[deckerego]

Large number of fixes for:

• Supporting earlier versions of Apache Camel
• Support for the most recent version of Apache Camel (2.9)
• Fixes for header-based routing keys
• Better error handling when defining exchanges

[deckerego]

Am going to re-issue this pull request with the auto-reconnect logic recently developed.