Added check for unchanged version numbers.

.travis.yml

@@ -1,7 +1,8 @@
 language: java
 
 before_script:
- - if find . -name "*.java" | xargs grep "System.out.print"; then echo "Found usage of direct print to console. Failing build."; exit 1; fi;
+ - build=true;for file in $(find . -name "*.java");do module_scan=$(grep -E "public +(final +)?class +\w+ +(extends +.* +)?implements +(\w+, *)?Module" "$file");if [ -z "$module_scan" ];then continue;fi;diff=$(git diff master "$file");if [ ! -z "$diff" ];then scanned=$(echo "$x" | grep "@Version");if [ -z "$scanned" ];then echo -e "Found modified module with unchanged version number: $file";build=false;fi;fi;done;if ! $build;then echo -e "Found one or more unchanged version numbers. Failing build.";exit 1;fi
+ - if find . -name "*.java" | xargs grep "System.out.print"; then echo "Found one or more direct prints to console. Failing build."; exit 1; fi;
 
 jdk:
  - openjdk8