Added default goal

clean package is JCT build default goal

Signed-off-by: Dominik Schadow <dominikschadow@googlemail.com>
Updated Tycho to 0.18

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

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