Rewrite timer command to use JSON

* Rewrite parseTime to use seconds instead of ms
	*  Move parseTime to timer subdirectory

* Implement checkTimer and sendTimerReminder.

util/timer/checkTimer.js

@@ -0,0 +1,11 @@
+const checkTimer = require('./checkTimer')
+const sendTimerReminder = require('./sendTimerReminder')
+module.exports = function (client) {
+	client.timers.forEach(timer => {
+		if(parseInt(timer.reminderDate) >= Math.floor(new Date() / 1000)){
+			sendTimerReminder(client, timer);
+			client.timers.pop(timer);
+		}
+	});
+	setTimeout(checkTimer, 1000, client);
+}

util/timer/parseTime.js

@@ -0,0 +1,19 @@
+module.exports = function(time){
+	let timeInSeconds = parseInt(time.slice(0, time.length - 1))
+	let letter = time.slice(time.length - 1)
+	if(!isNaN(letter)) return parseInt(time) * 60;
+	switch (letter.toUpperCase()) {
+		case "H":
+			timeInSeconds = timeInSeconds * 3600;	// 3 600 000
+			break;
+		case "M":
+			timeInSeconds = timeInSeconds * 60;		// 60 000
+			break;
+		case "S":
+			timeInSeconds = timeInSeconds;			// 1 000
+			break;
+		default:
+			timeInSeconds = -1;
+	}
+	return timeInSeconds;
+}

util/timer/sendTimerReminder.js

@@ -0,0 +1,3 @@
+module.exports = function (client, timer) {
+	client.channels.cache.get(timer.channel).send(`<@${timer.user}>, ${timer.customMessage}`);
+}