Plugin for Rosetta to enable real virus checking.

Rosetta is a digital preservation software by ExLibrisGroup, see
http://www.exlibrisgroup.com/de/ for details.

The plugin uses the free software freshclamd/clamAV, see 
http://www.clamav.net/lang/en/

The code is partially based on https://code.google.com/p/clamavj/source/browse/trunk/src/main/java/com/philvarner/clamavj/ClamScan.java?r=2
 https://github.com/vrtadmin/clamav-devel/blob/master/clamdscan/client.c and 
 https://github.com/vrtadmin/clamav-devel/blob/master/clamdscan/proto.c

 Hint: the plugin uses the VirusCheckPlugin interface version 2 now.

and therefore licenced via Apache License Version 2.0. 

Andreas Romeyke