* Makefile.am: Fix ETAGS_ARGS to recognize GUILE_PROC,

GUILE_PROC1.  Build guile-procedures.txt, and add that file to
pkgdata_DATA.

* load.c: Added `pkgdata-dir', `site-dir', `library-dir'
primitives.

* guile-doc-snarf.awk: Drop trailing space when no arguments:
e.g., "(foo )" is now "(foo)".

* *.c: moved all the documentation for primitives from
guile-doc/ref/{appendices,posix,scheme}.texi into the source code.
This leaves about half of the primitives undocumented.  Also, all
the markup is currently still texinfo.  I don't have a problem
with texinfo per se, but the markup is not very descriptive or
accurate.

libguile/error.c

@@ -89,7 +89,17 @@ scm_error (SCM key, const char *subr, const char *message, SCM args, SCM rest)
 /* Scheme interface to scm_error.  */
 GUILE_PROC(scm_error_scm, "scm-error", 5, 0, 0, 
            (SCM key, SCM subr, SCM message, SCM args, SCM rest),
-"")
+"Raise an error with key @var{key}.  @var{subr} can be a string naming
+the procedure associated with the error, or @code{#f}.  @var{message}
+is the error message string, possibly containing @code{%S} and @code{%s}
+escapes.  When an error is reported, these are replaced by formating the
+corresponding members of @var{args}: @code{%s} formats using @code{display}
+and @code{%S} formats using @code{write}.  @var{data} is a
+list or @code{#f} depending on @var{key}: if @var{key} is
+@code{system-error} then it should be a list
+containing the Unix @code{errno} value;  If @var{key} is @code{signal} then
+it should be a list containing the Unix signal number; otherwise it
+will usually be @code{#f}.")
 #define FUNC_NAME s_scm_error_scm
 {
   char *szSubr;
@@ -106,7 +116,7 @@ GUILE_PROC(scm_error_scm, "scm-error", 5, 0, 0,
 
 GUILE_PROC (scm_strerror, "strerror", 1, 0, 0, 
             (SCM err),
-"")
+"Returns the Unix error message corresponding to @var{errno}, an integer.")
 #define FUNC_NAME s_scm_strerror
 {
   SCM_VALIDATE_INT(1,err);