Moved from .NET 4.0 Client Profile to .NET 2.0

Signed-off-by: Swizzy <swizzy@hotmail.co.uk>
Embedded LibUsbDotNet and made it autoload it if not found externally...

Signed-off-by: Swizzy <swizzy@hotmail.co.uk>
Removed some useless files and added filters to the git repo to ignore these files...

Signed-off-by: Swizzy <swizzy@hotmail.co.uk>