Changelog:

• Fix parsing of network interface interface argument from vopono config file ~/.config/vopono/config.toml - issue #254 PR #258
• Fixes handling of target applications with spaces in the name. This applies for the target application and also postup and predown host scripts. Fixes issue #259 PR #264
• Add argument handling for postup and predown scripts, so these can be passed arguments now. PR #264
• Add vopono.host entry to the hosts file in the network namespace with the $VOPONO_HOST_IP if --allow-host-access is used. This allows you to access services on the host at http://vopono.host:80 etc. from inside the network namespace. Addresses issue #262 PR #264
• Add $VOPONO_FORWARDED_PORT environment variable if --port-forwarding or --custom-port-forwarding are used for
  provider port forwarding. Addresses issue #260 PR #264
• Added details on Plex port forwarding configuration to the USERGUIDE.md PR #264
• Added details on forwarding multiple ports from the network namespace PR #263 thanks @jramseygreen !