change default API address to 127.0.0.1 instead of localhost
change default API address to 127.0.0.1 instead of localhost

using `localhost` as the API address can cause a massive performance hit
on some systems (5-15+ seconds PER REQUEST). This is caused by the fact
that the api, when bound to `localhost`, only listens on IPv4
(127.0.0.1), but the OS tries IPV6 first and times out.

Sia Commit:
f2ac13e63ec8c2c172dc754ce80c5dbba4de34a9 [f2ac13e]
Author:
Johnathan Howell <me@johnathanhowell.com>
Date:
20 May 2017 at 00:23:28 GMT+2

rivine/rivine-UI,rivine/rivine-UI,rivine/rivine-UI