use lvh.me in case of using chrome

.dev domains are not accessible in latest Chrome.

I  suggest using lvh.me domain in case of using chrome.
lvh.me is a loop back domain to local (127.0.0.1).

via http://asciicasts.com/episodes/221-subdomains-in-rails-3

(https://github.com/basecamp/pow/issues/397)