Temporarily disabled Maven Checkstyle plugin.

pom.xml

@@ -377,6 +377,7 @@
 				<artifactId>aspectj-maven-plugin</artifactId>
 				<version>1.4</version>
 			</plugin>
+			<!--
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-checkstyle-plugin</artifactId>
@@ -385,6 +386,7 @@
 					<configLocation>ARSnova-checkstyle-checker.xml</configLocation>
 				</configuration>
 			</plugin>
+			-->
 			<plugin>
 				<groupId>org.apache.tomcat.maven</groupId>
 				<artifactId>tomcat7-maven-plugin</artifactId>