Config layout

[Tom Zeller]

> I tend to like configuration under META-INF,
> which is arguably a growing convention (JPA, CDI specs come to mind),
> but I can admit it's just more path elements to traverse without much
> value other than possibly convention.

Scott had proposed

 system/conf
 user/conf

which I massaged to

 internal/conf
 conf

which actually might could be

 classpath:META-INF/conf
 file:$IDP_HOME/conf

Meaning : hide files that should not be changed in the war, and look
to the filesystem at $IDP_HOME/conf for user configuration. That way,
the deliverable, the war, would not contain files that should be
changed by a deployer.

If at first run the IdP looks to $IDP_HOME/conf, and finds an empty
directory or whatever breadcrumbs we leave behind, it could prompt the
user to install or update, etc.