New check-in

Checked in some new codes to PPCam svn – I removed the dependency on the bmp file, now the weirdness of the window is controlled by program.

Also created two sub-windows, one for preview and one for remote, next step is getting preview window works (showing local video), and after that I will make remote window works.

I did some code clean up as well, I think I need to do it again as current code organization is not so good to me.