Added time estimate etc to the github mod downloading

lib/manager/modManager.js

@@ -147,14 +147,20 @@ module.exports.addMod = function(term, instance){
 				console.log("Downloading " + url);
 				let file = fs.createWriteStream(modDirectory + name);
 				let bytesDownloaded = 0;
+				let downloadStartTime = Date.now();
 				https.get(url, function(response) {
+					let bytesToDownload = response.headers['content-length'];
 					response.pipe(file);
 					response.on("data", chunk => {
 						bytesDownloaded += chunk.length;
-						sLog("Downloading "+name+": "+formatBytes(bytesDownloaded));
+						let downloadTimeElapsed = Date.now() - downloadStartTime;
+						let bytesPerSecond = bytesDownloaded / (downloadTimeElapsed/1000);
+						let timeToComplete = Math.floor((bytesToDownload - bytesDownloaded)/bytesPerSecond);
+						sLog("Downloading "+name+" "+(bytesDownloaded/bytesToDownload*100).toPrecision(3)+"% ("+formatBytes(bytesDownloaded)+" / "+formatBytes(bytesToDownload)+")\r\n"+
+						"about "+timeToComplete+" seconds remaining ("+formatBytes(bytesPerSecond)+"/s)");
 					}).on("end", x => {
 						sLog.clear();
-						console.log(""); // because sLog.clear() doesn't seem to do the job of ending the line properly
+						console.log(" Downloaded in "+moment.utc(moment.duration(Date.now()-downloadStartTime).as('milliseconds')).format('mm:ss')); // because sLog.clear() doesn't seem to do the job of ending the line properly
 					});
 				});
 			}