* Reorganized, reimplemented, and renamed many functions related to
contexts (telescopes Ξ and apply context Θ)
* Moved some test suite stuff to the top
* Various style fixes in comments, indentation and such
* Made the primitive form of elim (elim t_0 t_1), allowing this form to be
considered a value when t_0 and t_1 are values.
* Moved definition of values to reduction language, and fixed it. This
fixed issues with unique decomposition, and thus fixed reduction of
eliminators.
* Enabled caching in apply-reduction-relation* to speed up results of
recursive calls.
* Added single step meta-function to core
* Expose step/syn in redex-lang
* Added macro to sugar for convenience use
* Updated relevant docs (also fixed bug in reflection docs)
Previously, reflection procedures did not properly reify/reflect syntax
after evaluating in Redex. This limited compositionality of reflection
features.
No longer. Now all reflection procedures should reify their results back
into Cur syntax, and only top-level evaluation should result in Redex
datums (or explicit calls to cur->datum).
* run is user-definable through the existing reflection features; moved
to sugar.
* define need not have special function support in curnel; moved to
sugar.
* fixed relevant documentation
Moved all curnel code into curnel/, and split the two kernel modules
into separate files. Now the trusted core and the module/#lang stuff are
in separate files. The #lang is now reprovided by "cur.rkt", which
should also provide core agnostic sugar.
