[WHISKER-14] Change artifactId for the Maven plugin

git-svn-id: https://svn.apache.org/repos/asf/creadur/whisker/trunk@1622990 13f79535-47bb-0310-9956-ffa450edef68
Ignore IDEA-files.

git-svn-id: https://svn.apache.org/repos/asf/creadur/whisker/trunk@1622991 13f79535-47bb-0310-9956-ffa450edef68