libostree: Rename ostree-traverse.h into OstreeRepo namespace

This operates on the repo, it might as well be methods on it.

src/libostree/ostree-repo.h

@@ -317,5 +317,21 @@ gboolean ostree_repo_list_objects (OstreeRepo                  *self,
                                    GCancellable                *cancellable,
                                    GError                     **error);
 
+GHashTable *ostree_repo_traverse_new_reachable (void);
+
+gboolean ostree_repo_traverse_dirtree (OstreeRepo         *repo,
+                                       const char         *commit_checksum,
+                                       GHashTable         *inout_reachable,
+                                       GCancellable       *cancellable,
+                                       GError            **error);
+
+gboolean ostree_repo_traverse_commit (OstreeRepo         *repo,
+                                      const char         *commit_checksum,
+                                      int                 maxdepth,
+                                      GHashTable         *inout_reachable,
+                                      GCancellable       *cancellable,
+                                      GError            **error);
+
+
 G_END_DECLS