The memory map has been updated to include the thermometer SDB
descriptor.

Appendix B was added, containing guidelines on how to implement
a pulse repeater with more than six channels.

- added g_with_pulse_cnt
- added g_with_pulse_timetag
- added SR.PMISSE bit for each of the six channels
- made logic more customizable for g_nr_chans < 6
- doc: added reminder to treat board switches in Overview section

Also, update corresponding conv-regs.wb

In addition, the base address of conv-regs has been changed to three hex digits

- BIDR default reset value
- active values of several SR fields (SWITCHES, RTM, etc.)
- formatting in some registers
- also adapted .wb file to account for this

The main logic changes are that the output enable lines are now set after
the internal reset has been spent. This is to make sure that the lines are
only controlled by the FPGA and no erroneous glitches are generated.

Other changes include the addition of the RTM detection lines to the
interface, which are now reflected in the CONV Status Reg, and connecting
the reset from register line, which was previously unconnected.

Then, component instantiations and the SDB declaration for conv_regs have
been moved to the package file (conv_common_gw_pkg).

The simpler interface is by means of providing only one pulse and pulse LED port
per channel (both inputa and output). If there's an RTM involved, the splitting
should be done outside the module.

Then, the pulse inhibit is moved outside the g_with_fixed_pwidth block and provided
in the generally synthesizable block, so it gets synthesized regardless of the value
of the g_with_fixed_pwidth generic.