Gently fail Edirom Online if no Edition is available in database
Created by: bwbohl
If no edition is installed in the database the Edirom Online fails ungently with:
<exception>
<path>/db/apps/Edirom-Online/index.xql</path>
<message>err:FODC0005 exerr:ERROR Error. [at line 95, column 5] In function: edition:getPreferencesURI(xs:string) [9:38:/db/apps/Edirom-Online/data/xqm/edition.xqm]</message>
</exception>
This should be caught and a statement, e.g., "no edition available in the database", should be printed.