Feat/analytics

• Updates analytics so that they match IABv2 requirements:
  • https://iabtechlab.com/wp-content/uploads/2017/12/Podcast_Measurement_v2-Dec-20-2017.pdf
  • ✅ No IP address is ever stored on the server. Only aggregate data is stored in the database.
  • ✅ Rolling 24-hour window
  • ✅ Castopod does not do pre-load
  • ✅ IP Blacklisting https://github.com/client9/ipcat
  • ✅ User-agent Filtering https://github.com/opawg/user-agents
  • ✅ Ignores 2 bytes range "Range: 0-1" (performed by official Apple iOS Podcast app)
  • ✅ In case of partial content, adds up all requests to check >1mn was downloaded
  • ✅ Identifying Uniques is done with a combination of IP Address and User Agent
• Adds AMcharts
• Adds some graphs
• Adds regions to analytics
• Adds ipcat blacklist
• Enhances useragents performances
• Adds filesize and header size in order to calculate 1mn downloads
• Updates publisher ID3 field