make it possible to convert any web-page encoding to UTF-8

[aahutsal]

Asked this question on SO:
http://stackoverflow.com/questions/21572806/camel-how-to-predict-http-charchester-encoding-when-doing-conversion/21692128?noredirect=1#comment33112216_21692128

Check this: https://issues.apache.org/jira/browse/CAMEL-7217

If fixed in 2.13.1 - upgrade camel version used.