refactor iptc image parser to simplify extending it in sub class (#1753)
refactor iptc image parser to simplify extending it in sub class (#1753)


petrjasek/superdesk-core,superdesk/superdesk-core,petrjasek/superdesk-core,petrjasek/superdesk-core,superdesk/superdesk-core,superdesk/superdesk-core,superdesk/superdesk-core,petrjasek/superdesk-core