Tools for people envious of nvidia's blob driver.

Contents:

* docs: plain-text documentation of the GPUs, nVidia binary driver, and
  the tools (in-sync HTML version at http://envytools.rtfd.org)
* envydis: Disassembler and assembler for various ISAs found on nvidia
  GPUs
* rnn: Tools and libraries for the rules-ng-ng XML register database
  format
* rnndb: rnn database of nvidia MMIO registers, FIFO methods, and
  memory structures.
* nvbios: Tools to decode the card description structures found in
  nvidia VBIOS
* nva: Tools to directly access the GPU registers
* vstream: Tools to decode and encode raw video bitstreams
* vdpow: A tool aiding in VP3 reverse engineering
* easm: Utility code dealing with assembly language parsing & printing.
* util: Misc utility code shared between envytools modules

Some parts of envytools can be disabled with:
  HWTEST="no" NVA="no" VDPOW="no" ./envytools.SlackBuild

Both hwtest and vdpow require nva.

Optional dependencies:
  cudatoolkit