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/create/date-from-array.js

@@ -0,0 +1,35 @@
+export function createDate(y, m, d, h, M, s, ms) {
+    // can't just apply() to create a date:
+    // https://stackoverflow.com/q/181348
+    var date;
+    // the date constructor remaps years 0-99 to 1900-1999
+    if (y < 100 && y >= 0) {
+        // preserve leap years using a full 400 year cycle, then reset
+        date = new Date(y + 400, m, d, h, M, s, ms);
+        if (isFinite(date.getFullYear())) {
+            date.setFullYear(y);
+        }
+    } else {
+        date = new Date(y, m, d, h, M, s, ms);
+    }
+
+    return date;
+}
+
+export function createUTCDate(y) {
+    var date, args;
+    // the Date.UTC function remaps years 0-99 to 1900-1999
+    if (y < 100 && y >= 0) {
+        args = Array.prototype.slice.call(arguments);
+        // preserve leap years using a full 400 year cycle, then reset
+        args[0] = y + 400;
+        date = new Date(Date.UTC.apply(null, args));
+        if (isFinite(date.getUTCFullYear())) {
+            date.setUTCFullYear(y);
+        }
+    } else {
+        date = new Date(Date.UTC.apply(null, arguments));
+    }
+
+    return date;
+}