Installer flows

[Rod Widdowson]

> Did Java actually handle that?

No.  But I found inspiration on how one might do it - and it doesn't involve
extending Properties which is a pretty hateful Java 1.0 class when one looks
at it ("This is extents a hash, but please don't call allAll because it will
corrupt everything").  I use Properties to do the actual parsing which saves
a lot of effort around parsing.  It's checked in to idp-installation.

/R