fixes #37 - replaces string-based Java code auto importer by Eclipse JDT-based auto importer and refactors Java code formatter into separate class
updates all java-generating templates by inserting the hint "/// Sculptor code formatter imports ///" required by the new Java code auto importer introduced in #37
re-enables the java code formatter after fixing #29 by introducing the new Java code auto importer with #37
updates an auto-imported Java type in a test after introducing the new Java code auto importer with #37
adds a newline after every line read from a generated file
removes a logger which is obsolete due to the new Eclipse JDT-based Java code formatter