-added new Preferences Dialog for Appearance

-moved some Settings from General to Appearance ( Language, Style, stylesheet
-added checkbox for Start RetroShare with System start in GeneralDialog
-moved Rsharesettings to Preferences folder to find bether 
-added new RSettings source 
-clean uped some old code stuff in MainWindow which is not more needed
-replaced in MainWindow PreferencesWindows open function with new one.

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@684 b45a01b8-16f6-495d-af2f-9b41ad6348cc

retroshare-gui/src/gui/MainWindow.h

@@ -128,7 +128,7 @@ private slots:
     void addFriend();
     void inviteFriend();
     void addSharedDirectory();
-    void showPreferencesWindow();
+    //void showPreferencesWindow();
     void showMessengerWindow();
     void showApplWindow();
 	void showsmplayer();
@@ -140,6 +140,9 @@ private slots:
     /** Called when a child window requests the given help <b>topic</b>. */
     void showHelpDialog(const QString &topic);
 
+    /** Creates and displays the Configuration dialog with the current page set
+    * to <b>page</b>. */
+    void showPreferencesWindow(PreferencesWindow::Page page = PreferencesWindow::General);
 
     void showSettings();
     void setStyle();