Added code coverage via JaCoCo and Coveralls

.travis.yml

@@ -4,3 +4,5 @@ jdk:
   - oraclejdk7
   - openjdk7
   - openjdk6
+after_success:
+  - mvn clean test jacoco:report coveralls:jacoco

pom.xml

@@ -65,6 +65,24 @@
           <target>1.6</target>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.jacoco</groupId>
+        <artifactId>jacoco-maven-plugin</artifactId>
+        <version>0.7.0.201403182114</version>
+        <executions>
+          <execution>
+            <id>prepare-agent</id>
+            <goals>
+              <goal>prepare-agent</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.eluder.coveralls</groupId>
+        <artifactId>coveralls-maven-plugin</artifactId>
+        <version>2.2.0</version>
+      </plugin>
     </plugins>
   </build>
   <licenses>