CAMEL-5938 fix the issue of MailConverters fails with uppercase content type TEXT/PLAIN

git-svn-id: https://svn.apache.org/repos/asf/camel/trunk@1429707 13f79535-47bb-0310-9956-ffa450edef68
CAMEL-5937 Added sinceId option for camel-twitter pulling the status

git-svn-id: https://svn.apache.org/repos/asf/camel/trunk@1429708 13f79535-47bb-0310-9956-ffa450edef68
Fixed a typo of camel-cxf pom

git-svn-id: https://svn.apache.org/repos/asf/camel/trunk@1429709 13f79535-47bb-0310-9956-ffa450edef68