mmt:
- huge cleanup of nvidia ioctl tracing
  - it does not try to decode ioctls when it's not needed (it's demmt/mmt_bin2dedma job now)
  - when it must decode something (eg for embedded pointers) it does it in a much cleaner way
- text output removed
  - it was (always) broken in some subtle ways
  - binary mode is up to 10 times faster (yes, real world examples, like xonotic)
  - decoding on mmt side is just plain wrong
- all data found by pointers embedded in ioctl structures are now dumped (and demmt uses it)
- stdout/stderr output of an application can now be recorded in mmt stream (enabled by
  --mmt-trace-stdout-stderr) and demmt handles it
- NVRM_MTHD_SUBDEVICE_GET_CHIPSET injection - in the future demmt will autodetect chipset id
  based on this information
- there's some utility code for REing sizes of structures passed to ioctls and
  a code for automatic verification/detection of object sizes for "create" and "call" ioctls
  (--mmt-ioctl-create-fuzzer, --mmt-object-ctr, --mmt-ioctl-call-fuzzer)

demmt:
- nvidia ioctl decoding:
   - all fields before and after ioctl are dumped, a lot of them have sensible names
     - _pad fields are hidden, but only if they are equal to 0
   - major methods for CALL ioctl are decoded
   - ioctl statuses are translated to names
   - some ioctl queries are decoded
   - object handles are annotated with class information
   - classes in create ioctls are annotated with names
   - driver classes now have names
- output cleanup - most of the internal demmt messages are now hidden
- nve4_compute support
- command line options cleanup
- extensive filtering system (see https://github.com/envytools/envytools/commit/cf1e19047a6795eabe0622baa8584e0af18ff51a)
- color output is now enabled by default
- logs are not indented by default
- lots of fixes