fix(tox_kill): kill Tox properly. Close #20 (#103)

* fix(tox_kill): kill Tox properly. Close #20
* If disconnect is called, let's stop the Tox iteration
* The call tox_kill()

Author: SkyzohKey

src/MainWindow.vala

@@ -707,6 +707,7 @@ public class Ricin.MainWindow : Gtk.ApplicationWindow {
   ~MainWindow () {
     this.tox.save_data ();
     this.settings.save_settings ();
+    this.tox.disconnect ();
     //this.tox.handle = null;
     //this.tox = null;
   }

src/Ricin.vala

@@ -2,7 +2,7 @@ public class Ricin.Ricin : Gtk.Application {
   const string GETTEXT_PACKAGE = "ricin";
   public static const string APP_NAME = "Ricin";
   public static const string APP_SUMMARY = _("<b>Ricin</b> aims to be a <i>secure, lightweight, hackable and fully-customizable</i> chat client using the awesome and open-source <b>ToxCore</b> library.");
-  public static const string APP_VERSION = "0.0.6";
+  public static const string APP_VERSION = "0.0.6.1";
   public static const string RES_BASE_PATH = "/chat/tox/ricin/";
 
   private string default_theme = "dark"; // Will be overrided by settings.

src/Wrapper.vala

@@ -65,6 +65,9 @@ namespace Tox {
     private string? profile = null;
     internal Gdk.Pixbuf? avatar = null;
 
+    // Used to kill tox.
+    private bool must_stop = false;
+
     public string username {
       owned get {
         uint8[] chars = new uint8[this.handle.self_get_name_size ()];
@@ -365,12 +368,21 @@ namespace Tox {
       this.bootstrap.begin ();
     }
 
+    public void disconnect () {
+      this.must_stop = true;
+      this.handle.kill ();
+    }
+
     public void run_loop () {
       this.schedule_loop_iteration ();
     }
 
     private void schedule_loop_iteration () {
       Timeout.add (this.handle.iteration_interval (), () => {
+        if (this.must_stop) {
+          return true;
+        }
+
         this.handle.iterate ();
         this.schedule_loop_iteration ();
         //return Source.REMOVE;

vapis/libtoxcore.vapi

@@ -998,6 +998,15 @@ namespace ToxCore {
          */
         public Tox (Options? options = null, out ERR_NEW? error = null);
 
+        /**
+         * Releases all resources associated with the Tox instance and disconnects from
+         * the network.
+         *
+         * After calling this function, the Tox pointer becomes invalid. No other
+         * functions can be called, and the pointer value can no longer be read.
+         */
+        public void kill ();
+
         /**
          * @param friend_number The friend number of the friend whose name changed.
          * @param name A byte array containing the same data as