Update main.js

Missing http: for lines 40,42 and 81. Failed to load necessary CSS and Scripts.

Failed to load resource: net::ERR_FILE_NOT_FOUND file://netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js
Failed to load resource: net::ERR_FILE_NOT_FOUND file://netdna.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css
Failed to load resource: net::ERR_FILE_NOT_FOUND file://netdna.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css