Fix for example: Request format is mandatory 
Fix for example: Request format is mandatory 

Like documented in the example: https://github.com/Day8/re-frame-http-fx#step-2-registration-and-use
chpill/re-frankenstein,martinklepsch/re-frame,chpill/re-frankenstein,martinklepsch/re-frame,Day8/re-frame,Day8/re-frame,Day8/re-frame,chpill/re-frankenstein,martinklepsch/re-frame