Once this merges, I'll make a github release including the PDF, so the
first link will work.

https://lists.riscv.org/g/tech-committee-chairs/message/474 links to an
email showing that we're approved for freeze, but that email is not
publically available.

This commit implements facilities to decode register fields for each
register described in debug_defines.h.

`enum riscv_debug_reg_ordinal` -- provides a way to specify the
register. Address cannot be used for this purpose, since some registers
share a common address (e.g. `tdata1` and `mcontrol`).

Structure `riscv_debug_reg_ctx_t` -- provides a context sufficient to
decode a register (e.g. the width of `tselect` depends on `XLEN`).

Structure `riscv_debug_reg_info_t` -- contains register name and a list
of it's fields, accessible via a call of the function pointer.

Structure `riscv_debug_reg_field_list_t` -- represents an element of a
field list. If non-null, the call of the function pointer returns next
element of the list.

Structure `riscv_debug_reg_field_info_t` -- represents a field of a
register.

`get_riscv_debug_reg_info()` returns the structure corresponding to the
given register ordinal.

The debug task group mailing list has been moved to lists.riscv.org.
This updates the link for better discoverability.

Signed-off-by: hasheddan <georgedanielmangum@gmail.com>

There is currently no latest draft. Fixes #626.

* Add header to debug_defines.h

Also cleaned up the Makefile so `make debug_defines.h` actually works
right, and mentioned this make target in README.md.

* Include hash in debug_defines header.

* Remove end of line whitespace.

* Update registers.py to use Python 3

Python 2 is on its way out, switch the script to Python 3 instead.

* Update Travis to use Python 3

Part of changes to roll the errata into the main document, so people
don't have to chase down a separate document to check if the ratified
one is sane.

Now that it's been ratified.

* Create errata document.

* Mention the errata document in the spec itself.

Update the link to spec PDF, to reflect change of filename.

Fixes #219

* Setting up a Travis regression to check for build errors
* We don't use minted package for anything
* Get rid of more packages that are needed in one tiny place
* Remove package we don't need from the README
* Overview: Use PDF, not EPS, as pdflatex can't really handle EPS.
* Get rid of more wonky things

Add cross link back to the RISCV Working Group overview

Add contribution tips