Overhaul of Fannie's lane configuration editor. Using symlinks and
some relative path trickery, drop the actual lane install scripts
into an iframe. Each tab needs a wrapper script to get the fake
ini.php included and proper path established before including
the actual lane install script.

Motivations: Ensure options available at the server level are
identical to options available at the lane level. Allow server
config to detect and set plugin options. Keep both interfaces
in sync as far as where settings are stored while managaging
transistion to using parameters table.