Switch to SpecC

Another couple of YEARS without progress, but I'm still not giving up on Controlix. The latest justification for an update is that I've finally managed to get a working build of SpecC, and since I can also now write a back-end translator for Icarus for SpecC (and thus keep compatibility with Verilog and VHDL), I have decided to change the core language Controlix is written in (again!) to SpecC.

SpecC has many advantages here:

• Compatible with C, allowing easy integration with existing system code/tools everywhere
• Simple, fast and easy to port simulation library - should work on bare metal quite well
• Simpler and easier language to learn for the C-literate-only newbies to RTL

Does it have any significant disadvantages compared to Icarus or GHDL? I honestly can't see any right now, other than my pain of having to learn a lot of compiler-related stuff for the Icarus back-end job, and I don't have to do that right away. Here goes!