v0.21

Fixes

• [klehigh] fixed bro output

Features

• [mjbroekman] added csv output flag for duplicate supression
  added ipset output support

v0.20

• added ability to map 'additional_data1,additional_data1_meaning,additional_data2,addititonal_data2_meaning'
• fixed #40 (iptables output)
• fixed csirtgadgets/cif-v1#45 (iptables output)
• fixed csirtgadgets/cif-v1#46 (snort output)

v0.19

• added "address_mask" as a keyword, the ipv4 plugin handles