alexo/wro4j — pull request #208 by muffl0n (2014-09-18 13:44:03+00:00)
Title: Break build when resource is invalid and ignoreMissingResources = false

Somehow the incrementalBuilding-Feature broke the behaviour that ignoreMissingResource should provide.
This PR throws a MojoExecutionException if a resource is invalid and ignoreMissingResource is set to false.