Merge pull request jgrapht#114 from llkiwi2006/feature/pluginversion

Update the maven-compiler-plugin version to get full compiler error messages.

Author: jsichi

pom.xml

@@ -158,7 +158,7 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-compiler-plugin</artifactId>
-					<version>2.3.2</version>
+					<version>3.1</version>
 					<configuration>
 						<source>1.6</source>
 						<target>1.6</target>