Convert print_biom_python_config.py to use pyqi framework

Command is now:

```
biom show_install_info
```

Prints basically the same info as before, though I added pyqi version info and removed biom-format script version info, as we only need to report the biom-format version now. I moved the biom-format version info into the "package info" section as that's information about biom-format, not its dependencies.

Also cleaned up the code to remove duplication.