Fix Gradle build errors
Rebuilding Ant Build Files for new library slf4j-1.7.25
replacing outdated slf4j-Library
Fixing Test Cases for RC3
Preparing Version 2.0-RC3
Revert "fixed bug for semi-restrictive tile laying, that only one of the base tokens is considered for routing"
creating updated Gradle setup
Merge branch 'rails_2_maintenance' into rails_2_develop