+ back color

Signed-off-by: Dmitry Ponyatov <dponyatov@gmail.com>
+ main frame sizer for toolbar + working area sizing
+ wc.lib.ogl usage

Signed-off-by: Dmitry Ponyatov <dponyatov@gmail.com>
+ cfg drawing pens
- ogl usage (may be later), only direct GDI wx.DC
+ simple gluking demo

Signed-off-by: Dmitry Ponyatov <dponyatov@gmail.com>