Airca.st Is a free to use re-streaming website that allows you to stream from Twitch to another RTMP server so if you want to stream to Vimm then you can use this service, Here's How.
Step one Link your twitch:
Go to account
Click "Link Platform"
Sign in using your Twitch, YouTube Or Mixer account
Go to "Stream Profiles" then click New
Click "Add Destination" then "other" Go down to "Configure"
Choose the Source stream either from your twitch, mixer or YouTube.
PERFECT! You will now be able to stream from Twitch, Mixer Or YouTube to another RTMP Service like dlive or vimm
Just head on over to "Start Streaming" and hit Start Streaming.