Push Integration tutorial not working due to gist script mime error in firefox

http://socketo.me/docs/push#client

`The resource from “https://gist.githubusercontent.com/cboden/fcae978cfc016d506639c5241f94e772/raw/e974ce895df527c83b8e010124a034cfcf6c9f4b/autobahn.js” was blocked due to MIME type (“text/plain”) mismatch (X-Content-Type-Options: nosniff).`

