Updating CMakelist to allow edition (not build...yet) of source
code from Visual Studio, and cross-build into linux
(using shared folders) for raspberry-pi

This update allows to create a .sln using cmake with MSVC as generator.
It is not possible to link with libusb on windows yet (work in progress).

@todo (amorellio) : Create a Findlibusb script to support both windows
and linux source edition / build.
Update cross-build information for raspberry pi.

This changes was made using :
crosstool-ng-1.19.0
Ubuntu (gnome) version 13.10
Minor code updates / moves