Missing dependency 'com.sap.core.js.catalina.fragment' + using cargo for dev

I have found that the following dependency could not be resolved:

```
-    <dependency>
-      <groupId>com.sap.core.js.catalina</groupId>
-      <artifactId>com.sap.core.js.catalina.fragment</artifactId>
-      <version>1.1.1</version>
-      <scope>provided</scope>
-    </dependency>
```

hence I have removed this and following Tomcat dependency.

Moreover, I have added a ```dev``` profile so that the ref implementation can be started via command-line as
```
$ mvn -Pdev
```