Update changelog for next version
Separate out the inner classes of XmlParser
#1290 RuleSetReferenceId does not process HTTP(S) correctly.

Fixed the bug and added one unit test.
Merge branch 'master' of https://github.com/msiemczyk/pmd
Update changelog
Implement possibility to specify a Single Rule from a Ruleset via http
Add a timeout for retrieving a ruleset from a URL
By default, timeout is 5 seconds