Fixes #18 - Introduce WicketWebjars#isInstalled(Application)
Merge pull request #19 from martin-g/18-WicketWebjars-isInstalled

Fixes #18 - Introduce WicketWebjars#isInstalled(Application)
Fixes #20 - Add a check for null class
Merge pull request #21 from martin-g/20-npe-while-locating

Fixes #20 - Add a check for null class
Merge branch 'master' into wicket7