Wicket-Bootstrap #280 - Return null if a resource cannot be found
PR #4 - Log an info when a resource cannot be found

This is a normal situation when Wicket searches for .min version of the resource
PR #4 - Add a test case that WebjarsResourceFinder#find() returns null for missing resources
Merge pull request #4 from martin-g/master

Wicket-Bootstrap #280 - Return null if a resource cannot be found