SETQ, MULTIPLE-VALUE-SETQ: Handle symbol macros.
Experimental pseudo-improvements.

...that cause random MEMORY-FAULT-ERRORs.
Simplify.
LAMBDA: Revert to using PROGV.
Reformat.
LET*: Reimplement on top of LET.
Merge branch 'master' of github.com:benkard/sb-eval2

Conflicts:
	sb-eval2.lisp