* deprecated.c, deprecated.h, eval.c, eval.h: Deprecated

	* deprecated.c, deprecated.h, eval.c, eval.h: Deprecated
	scm_s_expression, scm_s_test, scm_s_body, scm_s_bindings,
	scm_s_variable, scm_s_clauses, scm_s_formals.  In eval.c the
	definitions are make static and renamed from scm_s_xxx to s_xxx.
	In deprecated.c the original definitions are copied.

	* deprecated.h, eval.c, eval: Deprecated SCM_EVALIM2, SCM_EVALIM,
	SCM_XEVAL and SCM_XEVALCAR.  The macro definitions are moved from
	eval.h into eval.c and a copy (slightly modified to work in user
	code) is placed into deprecated.h.

	* eval.c: Use the local static s_xxx definitions instead of the
	scm_s_xxx definitions throughout.