v0.9 - qemu guest agent and full spice support

Small bump for a few changes:

• Documentation/--help output changes
• Added -spice, -qemu-agent and the optional -agents for both.
• Updated the default bios path and for secboot mode to use the 4m.fd OVMF_CODE firmware (4M includes more efi variable space and is commonly used.)
• Cleaned up looking-glass arguments and switched to using a socket with the introduction of -spice. Same for adding a USB controller outside the -usb regex loop if -spice is used.
• Change -display sdl to a variable based on the arguments given like the rest of the generic components.
• Automatically launch remote-viewer if -spice is given or looking-glass-client if -looking-glass is given