Issue 13 fixed

Changes: 

  1 - Changed class com.obomprogramador.tools.jqana.parsers.Lcom4Listener, method: enterMethodDeclaration. Added the check: 

``` java
  if (!this.membersTable.contains(member)) {
                this.membersTable.add(member);    
  }
```

2 - New test case created: "TestLoopLcom4", and both files (.java and .class) added to: 
* /jqana/src/test/resources/unit-test-sources/java/def
* /jqana/src/test/resources/def

3 - Property file changed: "/jqana/src/main/resources/report.properties", to add the test results for the new test case