Maven pom.xml with owlapi dependency

Just to make it easier to build without messing with classpaths etc..

I did not move the folders to Maven style src/main/java, the currebnt path is given as

    <sourceDirectory>StrigiDoc/src</sourceDirectory>


Example of building:
```
stain@rpc268:~/src/strigidoc$ mvn package
Cstain@rpc268:~/src/strigidoc$ java -jar target/strigidoc-0.1-SNAPSHOT-standalone.jar http://purl.org/pav/
```