Added new features

Now you can select a default download directory, added a donation window
form

youtube-dl GUI/DonateForm.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace JAYG
+{
+    public partial class DonateForm : Form
+    {
+        public DonateForm()
+        {
+            InitializeComponent();
+            donateform_label.Text = "JAYG is a free and open source software\n\r" +
+                                    "if you liked it you can buy me a beer!\n\r";
+
+        }
+
+        private void DonateForm_Load(object sender, EventArgs e)
+        {
+
+        }
+
+
+    }
+}