Add generic demultiplexer component (demux_generic)

[hansu]

Based on Andys mux_generic component, just changed minimal to have a demultiplexer.
So I am not sure what to insert as author...

Further I added two variants of a symbol using just unicode characters, so also displayable in the console. Which one you guys like better?

            demux-gen.NN.sel-bit-00 ───────────────────┐
                                ... ─────────────────┐ │
            demux-gen.NN.sel-bit-MM ───────────────┐ │ │
               demux-gen.NN.sel-int ─────────────┐ │ │ │
                                         ┌───────┴─┴─┴─┴───────┐
                                         │          / o─────   ├───── demux-gen.NN.out-[bit/float/s32/u32]-01
demux-gen.NN.in-[bit/float/s32/u32] ─────┤   ─────o   o─────   ├───── ...
                                         │            o─────   ├───── demux-gen.NN.out-[bit/float/s32/u32]-MM
     demux-gen.NN.suppress-no-input ─────┤                     │
           demux-gen.NN.debounce-us ─────┤                     │
                                         └─────────────────────┘


                                         ┌─────────────────────┐
demux-gen.NN.in-[bit/float/s32/u32] ─────┤                     │
                                         │                     │
            demux-gen.NN.sel-bit-00 ─────┤                     ├───── demux-gen.NN.out-[bit/float/s32/u32]-01
                                ... ─────┤    demux_generic    ├───── ...
            demux-gen.NN.sel-bit-MM ─────┤                     ├───── demux-gen.NN.out-[bit/float/s32/u32]-MM
               demux-gen.NN.sel-int ─────┤                     │
     demux-gen.NN.suppress-no-input ─────┤                     │
           demux-gen.NN.debounce-us ─────┤                     │
                                         └─────────────────────┘

[andypugh]

I think the top image is clearer.

[hansu]

Ok. And the author?

[andypugh]

I would say change the module_author, but leave the copyright shared.

[hansu]

Ok, done