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

--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.

Proper ISE version is detetcted basing on XILINX variable.
Afterwards, a path to ISE installtion (default) is put
into the makefile.

From now on, it shouldn't complain about a missing module,
if in fact it is already fetched

Now modules to be fetched are recognized properly

A manifest variable 'syn_name' has been introduced
instead of 'name'. This variables indicates the remote
directory to be used. If it is not set in the manifest, its value
is based on the syn_project variable.

An automatic flow has been added. This means that when there no
run arguments indicating what to do, hdlmake tries to guess
the action on its own basing on the manifest.

Manifest's target indicates what is the synthesis target
(xilinx/altera). This influences what kind of project for synthesis
is made (qpf, xise).

Manifest's action indicates, if the manifest is used for synthesis,
simulation or cannot be treated as a top manifest.