doc: update SAPI

Update Quartus section and fix some formatting issues.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
doc: fix CAPI syntax and does cleanup

As this, capi.txt cannot be convert by asciidoc.
Also fix some formatting problems.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
sim: use depend option in all simulators

A previous commit introduced "depend" for cores to be fetched
only when a specific simulator is used. This commit added this
option to Icarus only.

This patch add "depend" to Modelsim and Verilator.

It also change the way options are handled by Modelsim.
It is now done the same way Icarus and Verilator do it.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
modelsim.py: Run vsim in quiet mode