Some small changes while I'm exploring the code.

Hi,
I've added other intermediaries to the ignore list since we don't want to have object files committed by mistake.
I also enabled the rebuild of the ram disk, since I assume people will rely on the module to be present at boot time. Thus if we install as dkms, we want to make sure the module gets added to the boot image each time someone upgrades their kernel via standard distro tools.