Made script defer since SSR

Script should be defer from the page rendering and not blocking since the output from the server should carry the complete html
Script to load a 2.1MB bundle should be deferred
Merge pull request #17 from ptomasroos/patch-1

Made script deferred since SSR
Merge pull request #18 from ptomasroos/patch-2

Script to load a 2.1MB bundle should be deferred