Support 0.8.0

This actually should be merged into a new debian/experimental branch of some sort, per BTS

Many changes have been made to zfsonlinux. In particular, SPL has been merged in. This patch queue integrates these changes.

The most significant missing component from this queue is a properly vetted debian/copyright file. Given the amount of churn since 0.7.x, it certainly needs a careful look-over by someone who actually understands it, (and copyright.cme)