Update Copyright in About dialog for 2015.

src/mainwindow.cpp

@@ -964,14 +964,14 @@ void MainWindow::on_actionAbout_Shotcut_triggered()
     QMessageBox::about(this, tr("About Shotcut"),
              tr("<h1>Shotcut version %1</h1>"
                 "<p><a href=\"http://www.shotcut.org/\">Shotcut</a> is a free, open source, cross platform video editor.</p>"
-                "<small><p>Copyright &copy; 2011-2014 <a href=\"http://www.meltytech.com/\">Meltytech</a>, LLC</p>"
+                "<small><p>Copyright &copy; 2011-2015 <a href=\"http://www.meltytech.com/\">Meltytech</a>, LLC</p>"
                 "<p>Licensed under the <a href=\"http://www.gnu.org/licenses/gpl.html\">GNU General Public License v3.0</a></p>"
                 "<p>This program proudly uses the following projects:<ul>"
                 "<li><a href=\"http://www.qt-project.org/\">Qt</a> application and UI framework</li>"
                 "<li><a href=\"http://www.mltframework.org/\">MLT</a> multimedia authoring framework</li>"
                 "<li><a href=\"http://www.ffmpeg.org/\">FFmpeg</a> multimedia format and codec libraries</li>"
                 "<li><a href=\"http://www.videolan.org/developers/x264.html\">x264</a> H.264 encoder</li>"
-                "<li><a href=\"http://www.webmproject.org/\">WebM</a> VP8 encoder</li>"
+                "<li><a href=\"http://www.webmproject.org/\">WebM</a> VP8 and VP9 encoders</li>"
                 "<li><a href=\"http://lame.sourceforge.net/\">LAME</a> MP3 encoder</li>"
                 "<li><a href=\"http://www.dyne.org/software/frei0r/\">Frei0r</a> video plugins</li>"
                 "<li><a href=\"http://www.ladspa.org/\">LADSPA</a> audio plugins</li>"