Multi route stream support

Features

• Support multi-route detection (#264)
  • Change stream model to support multiple routes
  • Simplify attack algorithm
  • Use dummy route to detect cameras which accept all routes
• Set module version to v5 (#265)
  • Update README to reflect changes
  • Various README improvements

Bugfixes

• Fix stream discovery on non-standard ports by using service info mode in nmap scan (#266)
• No longer enables debug by default
• Makes verbose mode work (used to not do anything)

Misc

• Move issue template to .github and remove old changelog file
• Reword error message when no stream is found
• Remove unnecessary import alias