Update Rome to new official repository

Rome projects moved to github: http://rometools.github.io/rome/

We should now use:

```pom.xml
        <dependency>
            <groupId>org.rometools</groupId>
            <artifactId>rome-fetcher</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>org.rometools</groupId>
            <artifactId>rome-modules</artifactId>
            <version>1.0</version>
        </dependency>
```

Closes #19.