Inspect web configuration

This pull request implement "-i" command line options which lets user inspect web configuration on the command line.

Example output:

```sh
friebe@thekid ~/devel/dialog [master]
$ xpws -r doc_root localhost:8080 -i -p prod
xpws-prod @ localhost:8080, D:\cygwin\home\friebe\devel\dialog\doc_root {
  Route</rss/*> => xp.scriptlet.WebApplication(rss)@{
    [config       ] {WEBROOT}/etc
    [scriptlet    ] de.thekid.dialog.scriptlet.RssScriptlet
    [debug        ] NONE
    [arguments    ] [{WEBROOT}/data/]
    [environment  ] [
    ]
  }
  Route</*> => xp.scriptlet.WebApplication(dialog)@{
    [config       ] {WEBROOT}/etc
    [scriptlet    ] de.thekid.dialog.scriptlet.WebsiteScriptlet
    [debug        ] NONE
    [arguments    ] [de.thekid.dialog.scriptlet, {WEBROOT}/xsl]
    [environment  ] [
      DEF_PROD => "dialog"
      DEF_LANG => "en_US"
      DEF_STATE => "static"
    ]
  }
}
```

This pull request depends on `xp.scriptlet.Inspect` in XP Framework - see separate pull request.