Fixed the stream closed bug

Signed-off-by: Dominik Schadow <dominikschadow@googlemail.com>
Updated IDs

Signed-off-by: Dominik Schadow <dominikschadow@googlemail.com>
Updated help to match extended plug-in

Signed-off-by: Dominik Schadow <dominikschadow@googlemail.com>
Implemented XML signature in JCT

First draft, removed unused classes, switched to JCrypTool keystore

Signed-off-by: Dominik Schadow <dominikschadow@googlemail.com>
Updated tests to match extended plug-in

Signed-off-by: Dominik Schadow <dominikschadow@googlemail.com>