Reorganised source files to make navigation easier

All tests still pass (slightly to my surprise)

src/vectorspace.h

@@ -1,70 +0,0 @@
-/**
- *  vectorspace.h
- *
- *  Declarations common to all vector space objects.
- *
- *
- *  (c) 2017 Simon Brooke <simon@journeyman.cc>
- *  Licensed under GPL version 2.0, or, at your option, any later version.
- */
-
-#include <stdbool.h>
-#include <stdint.h>
-#include <stdio.h>
-/*
- * wide characters
- */
-#include <wchar.h>
-#include <wctype.h>
-
-#include "consspaceobject.h"
-
-#ifndef __vectorspace_h
-#define __vectorspace_h
-
-/*
- * part of the implementation structure of a namespace.
- */
-#define HASHTAG "HASH"
-#define HASHTV 0
-
-/*
- * a namespace (i.e. a binding of names to values, implemented as a hashmap)
- */
-#define NAMESPACETAG "NMSP"
-#define NAMESPACETV 0
-
-/*
- * a vector of cons pointers.
- */
-#define VECTORTAG "VECT"
-#define VECTORTV 0
-
-#define pointer_to_vso(pointer)(vectorpointp(pointer)? pointer2cell(pointer).payload.vectorp.address : 0)
-
-struct cons_pointer make_vso( char *tag, long int payload_size);
-
-struct vector_space_header {
-      union {
-        char bytes[TAGLENGTH];  /* the tag (type) of the
-                                 * vector-space object this cell
-                                 * points to, considered as bytes.
-                                 * NOTE that the vector space object
-                                 * should itself have the identical
-                                 * tag. */
-        uint32_t value;         /* the tag considered as a number */
-    } tag;
-    struct cons_pointer vecp;   /* back pointer to the vector pointer
-                                 * which uniquely points to this vso */
-  uint64_t size;                /* the size of my payload, in bytes */
-  char mark;                    /* mark bit for marking/sweeping the
-                                 * heap (not in this version) */
-  char payload;                 /* we'll malloc `size` bytes for payload,
-                                 * `payload` is just the first of these.
-                                 * TODO: this is almost certainly not
-                                 * idiomatic C. */
-};
-
-#endif
-
-