Merge branch 'feat/dmnapp' into 'develop'

dmnverifierapi/pom.xml

...nikoblenz/fgbks/core/dmn/verification/metrics/Metric.java

...oblenz/fgbks/core/dmn/verification/metrics/MetricSet.java

...core/dmn/verification/result/actions/VerificationFix.java

...rifier/classification/DecisionLogicLevelVerification.java

...verifier/classification/DrdModelingLevelVerification.java

...on/verifier/classification/ModelingLevelVerification.java

...tion/verifier/classification/SyntaxLevelVerification.java

...erification/verifier/impl/MissingInputColumnVerifier.java

...e/dmn/verification/verifier/impl/MissingRuleVerifier.java

...src/main/resources/META-INF/resources/css/stylesheets.css

...frontend/src/main/resources/META-INF/resources/index.html

...d/src/main/resources/META-INF/resources/js/dmnVerifier.js

dmnverifierparent/pom.xml