Adapt Relay Search integration to Metrics' project standards

Depending on the decision Metrics Team reaches:

== In case Relay Search is merged into metrics-web

This would require to add RS code to the appropriate places in metrics-web. (see comment:5 for a first draft branch)

== In case Relay Search stays separate

RelaySearch integration needs some tuning and streamlining: First steps

1. Move from src/main/resources/web/rs into src/submods/relaysearch
2. Only include fonts once into the war file (currently these are duplicated)
3. Avoid including readme files and scripts that are not needed for the running web application into the war file.
4. Separate preparation steps inside RelaySearch from building the war.
5. Create an Ant task that prepares RelaySearch for war file inclusion and adds the needed files to the war file.

More tasks should be added as comments.