Changed src target level and updated JavaDoc plugin.

pom.xml

@@ -112,8 +112,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>2.3.2</version>
                 <configuration>
-                    <source>1.6</source>
+                    <source>1.5</source>
-                    <target>1.6</target>
+                    <target>1.5</target>
                 </configuration>
             </plugin>
 
@@ -177,7 +177,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
-                        <version>2.7</version>
+                        <version>2.8.1</version>
                         <executions>
                             <execution>
                                 <id>attach-javadocs</id>