Get off off rails-assets

Just moving the things we currently use (and should drop in the ASAP) to vendor/assets

vendor/assets/javascripts/momentjs/src/lib/moment/from.js

@@ -0,0 +1,20 @@
+import { createDuration } from '../duration/create';
+import { createLocal } from '../create/local';
+import { isMoment } from '../moment/constructor';
+
+export function from(time, withoutSuffix) {
+    if (
+        this.isValid() &&
+        ((isMoment(time) && time.isValid()) || createLocal(time).isValid())
+    ) {
+        return createDuration({ to: this, from: time })
+            .locale(this.locale())
+            .humanize(!withoutSuffix);
+    } else {
+        return this.localeData().invalidDate();
+    }
+}
+
+export function fromNow(withoutSuffix) {
+    return this.from(createLocal(), withoutSuffix);
+}