Show pid in Panel.
Squashed commit of the following:

commit 34c1336d3077018fea0fc229a42f7da7017309e9
Author: Daniel (dmilith) Dettlaff <dmilith@me.com>
Date:   Thu Sep 18 16:09:27 2014 +0200

    Refactored direct access to fields with getters in panel.

commit 08acf57c9c402fd0d342b1ed9482b82ff5e1f1e7
Author: Daniel (dmilith) Dettlaff <dmilith@me.com>
Date:   Thu Sep 18 16:08:38 2014 +0200

    Display load average in panel.

commit 684bf8369e92d0206bc5f2123d866b4b4ec85faa
Author: Daniel (dmilith) Dettlaff <dmilith@me.com>
Date:   Thu Sep 18 16:06:46 2014 +0200

    Implemented functions to get load from system.
Use Qt5 core.