Allow dates to be used in timer command

And some general cleanup of a couple of functions.

util/timer/timeUntil.js

@@ -0,0 +1,20 @@
+module.exports = function(targetTime) {
+    const countDownDate = new Date(targetTime).getTime();
+    const now = new Date().getTime();
+  
+    const distance = countDownDate - now;
+    let days = Math.floor(distance / (1000 * 60 * 60 * 24));
+    let hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
+    let minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
+    let seconds = Math.floor((distance % (1000 * 60)) / 1000);
+  
+    if (seconds < 0) { // Due to how the math above works, if the input time is in the past, the time will be off by 1.
+      days = days + 1;
+      hours = hours + 1;
+      minutes = minutes + 1;
+      seconds = seconds + 1;
+    }
+    
+    const totalInSeconds = (days * 24 * 60 * 60) + (hours * 60 * 60) + (minutes * 60) + seconds;
+    return { days, hours, minutes, seconds, totalInSeconds };
+}