Updated for latest Gradle version and updated package structure

.editorconfig

.travis.yml

build.gradle

gradle.properties

gradle/wrapper/gradle-wrapper.jar

gradle/wrapper/gradle-wrapper.properties

gradlew

gradlew.bat

src/main/java/de/thro/inf/prg3/a12/App.java

src/main/java/de/thro/inf/prg3/a12/icndb/ICNDBApi.java

src/main/java/de/thro/inf/prg3/a12/icndb/ICNDBService.java

src/main/java/de/thro/inf/prg3/a12/icndb/JokeGenerator.java

...e/thro/inf/prg3/a12/icndb/suppliers/AllJokesSupplier.java

...thro/inf/prg3/a12/icndb/suppliers/RandomJokeSupplier.java

src/main/java/de/thro/inf/prg3/a12/model/JokeDto.java

...main/java/de/thro/inf/prg3/a12/model/ResponseWrapper.java

src/test/java/de/thro/inf/prg3/a12/icndb/ICNDBTests.java

.../java/de/thro/inf/prg3/a12/icndb/JokesGeneratorTests.java