Wishlist: How to compile

It would be nice if there was a section before Installation that was called Compilation and reminded people how to build a program using autotools. For example,

## Compilation

Salsa-lib uses the standard GNU autotools for portability. To compile, run these commands:

```bash
autoupdate
autoreconf -i
./configure
make
```

See below for options you can give to `./configure`.