m2eclipse compatibility

See https://github.com/easysoa/EasySOA/issues/93

• upgrade maven-resources-plugin to 2.4
• add the following configuration for m2eclipse compliance with incremental-build-plugin:

    <build>
      <pluginManagement>
        <plugins>
          <!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.-->
          <plugin>
            <groupId>org.eclipse.m2e</groupId>
            <artifactId>lifecycle-mapping</artifactId>
            <version>1.0.0</version>
            <configuration>
              <lifecycleMappingMetadata>
                <pluginExecutions>
                  <pluginExecution>
                    <pluginExecutionFilter>
                      <groupId>net.java.maven-incremental-build</groupId>
                      <artifactId>incremental-build-plugin</artifactId>
                      <versionRange>[1.4,)</versionRange>
                      <goals>
                        <goal>incremental-build</goal>
                      </goals>
                    </pluginExecutionFilter>
                    <action>
                      <ignore></ignore>
                    </action>
                  </pluginExecution>
                </pluginExecutions>
              </lifecycleMappingMetadata>
            </configuration>
          </plugin>
        </plugins>
      </pluginManagement>
    </build>