## More data in introspection files

- Used compilers are listed in `intro-compilers.json`
- Informations about `host`, `build` and `target` machines 
  are lister in `intro-machines.json`
- `intro-dependencies.json` now includes internal dependencies,
  and relations between dependencies.
- `intro-targets.json` now includes dependencies, `vs_module_defs`,
  `win_subsystem`, and linker parameters.