Implement time gap indicators

Get rid of short human times (1m, 1h, 1d) for now

js/lib/utils/human-time.js

@@ -1,21 +1,3 @@
-moment.locale('en', {
-  relativeTime : {
-    future: "in %s",
-    past: "%s ago",
-    s:  "seconds",
-    m:  "1m",
-    mm: "%dm",
-    h:  "1h",
-    hh: "%dh",
-    d:  "1d",
-    dd: "%dd",
-    M:  "a month",
-    MM: "%d months",
-    y:  "a year",
-    yy: "%d years"
-  }
-});
-
 export default function humanTime(time) {
   var m = moment(time);