Attempt on fixing live-reload over local network

This PR is to bring your attention to the issue when live-reload server resides on local network (eg. 192.168.42.1).

Due to the hardcoded `localhost` client attempts to connect to wrong server, which results in the following error:

`GET http://localhost:35729/livereload.js?snipver=1 net::ERR_CONNECTION_REFUSED`

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NOTE this may not be intended way to fix this since it will require one the following fixes in ember-cli app/addon:
* Updating config for: contentSecurityPolicy to include `'script-src': 'unsafe-eval'`
* or removing dependency of `ember-cli-content-security-policy` (which I did)