Feature: Implement IKI support in controller program.

Feature: Implement IKI support in controller program.

The functionality is designed to mimic some of the design used in Featureless Make in regards to IKI variables.

There are now "define", "parameter", and "program" IKI vocabularies available.

The "program" should probably have some sort of security property in an Entry to restrict its use.
There is a likelyhood of some design not wanting to expose the program parameters to the Rule.
I may also want to implement a "time" vocabulary in the future (likely to happen no sooner than FLL-0.5.0).

It appears that the define environment variables are not being exported as expected.
This is either an existing bug or a problem in the new feature.
Having reviewed this, I suspect that the problem is in the existing design.
A follow up commit will address this issue.

The --simulate and --test displays any loaded IKI variables.