* defs.h (enum language): Add language_scm.

	* defs.h (enum language):  Add language_scm.
	* expression.h (enum exp_code):  Added OP_EXPRSTRING.
	* scm-lang.c:  Preliminary support for Guile /SCM dialect of Scheme.
	* expprint.c (print_subexp):  Add OP_EXPRSTRING support.
	* parse.c (length_of_subexp, prefixify_subexp):  Likewise.
	* valops.c (find_function_in_inferior):  New function.
	(value_allocate_space_in_inferior):  New function.
	(allocate_space_in_inferior):  Redefine using previous function.
	* Makefile.in (SFILES):  Add scm-lang.c.
	(COMMON_OBS):  Add scm-lang.o