There was a bug fixed because of which hdl-make
didn't work properly without specifying run
parameters (there was no default action)

There was a bug that caused wrong dependency
solving for Verilog files. As reasult, there were
misleading error messages printed (like
Cannot find include for file src/lm32_shifter.v: l)

--list enables people to list content of their modules.
Indentation makes easier visual recognition of the
content.

--clean forces hdlmake to remove modules fetched
from repositories. All unneeded folders are removed
either.