Added getValue to Literal.

...ain/java/de/evoal/core/api/model/io/PropertiesWriter.java

...ava/de/evoal/core/api/properties/io/PropertiesWriter.java

.../de.evoal.surrogate.simple/src/main/java/module-info.java

...oal.surrogate.svr/src/main/resources/META-INF/MANIFEST.MF

...evoal.surrogate.svr/src/main/resources/META-INF/beans.xml

src/languages/de.evoal.languages.model.el/model/model.ecore

...anguages/de.evoal.languages.model.el/model/model.genmodel

...del.el/src-gen/de/evoal/languages/model/el/ELPackage.java

...model.el/src-gen/de/evoal/languages/model/el/Literal.java

...c-gen/de/evoal/languages/model/el/impl/ELPackageImpl.java

...src-gen/de/evoal/languages/model/el/impl/LiteralImpl.java

...n/de/evoal/languages/model/el/impl/NumberLiteralImpl.java