χvln

Results 4 issues of χvln

- several were unused - capstone was out of date (needed no changes) - num was used when num_traits (which was already present) would work - paste is only needed...

It's pretty strange that this library defines all the weak symbols that it does. I can't think of a good reason for it, and I can think of many downsides......

Would you take a patch adding conditional `extern "C" {}` blocks to the headers? Thanks for the great project either way.

The links to `bluenoise{.trimmed,}.bin` in https://github.com/prideout/par/blob/master/par_bluenoise.h#L9-L10 are dead, making the library unclear how to use.