Fix scaladoc invocation warning, and enable javac warnings properly, with plugin config updates

Author: srowen

pom.xml

@@ -613,12 +613,13 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-compiler-plugin</artifactId>
-          <version>2.5.1</version>
+          <version>3.1</version>
           <configuration>
             <source>${java.version}</source>
             <target>${java.version}</target>
             <encoding>UTF-8</encoding>
             <maxmem>1024m</maxmem>
+            <fork>true</fork>
           </configuration>
         </plugin>
         <plugin>
@@ -633,7 +634,7 @@
         <plugin>
           <groupId>org.scalatest</groupId>
           <artifactId>scalatest-maven-plugin</artifactId>
-          <version>1.0-M2</version>
+          <version>1.0-RC2</version>
           <configuration>
             <reportsDirectory>${project.build.directory}/surefire-reports</reportsDirectory>
             <junitxml>.</junitxml>