Merge pull request #18 from gutsal-arsen/master

upgraded to grails 2.1.1, camel 2.9.4
Code cleanup
Upgraded to 2.2.0
Bumped version to 1.2.3
Add plugin configuration option "useMDCLogging" to enable/disable MDC logging on the camel context.
Merge pull request #19 from BungleFeet/master

Add ability to enable MDC logging on Camel Context
Merge pull request #1 from padcom/master

pull request