fixed some problems in web application according to database connections

added node and grunt dependency to gradle (nodejs is needed by grunt)
updated gradle wrapper version (using 1.11 now)

(no more open connections should remain after testing now)

some class refactoring

(settings for gradle_krismer are now applied in jenkins directly)

reworked method visibility

...new values create smoother graphs

after/beforeCalculation methods)

preparations for JDK8 update

preparations for JDK update

fixed some generic type interferences

(now versions can be installed from nexus repository)

fixed problems with cargo deploy

improved error handling when geoserver could not create layers
fixed todo (added logging output on database table creation)
added some argument checks in DbUtility class

is not deployed on local test machine -> since the eclipse IDE deploys
the code in this case)