Implement putting clients onto specific workspaces ("assign" in the configfile)

This closes ticket #39

include/util.h

@@ -123,13 +123,6 @@ void check_error(xcb_connection_t *conn, xcb_void_cookie_t cookie, char *err_mes
  */
 char *convert_utf8_to_ucs2(char *input, int *real_strlen);
 
-/**
- * Removes the given client from the container, either because it will be inserted into another
- * one or because it was unmapped
- *
- */
-void remove_client_from_container(xcb_connection_t *conn, Client *client, Container *container);
-
 /**
  * Returns the client which comes next in focus stack (= was selected before) for
  * the given container, optionally excluding the given client.
@@ -169,13 +162,6 @@ void leave_stack_mode(xcb_connection_t *conn, Container *container);
  */
 void switch_layout_mode(xcb_connection_t *conn, Container *container, int mode);
 
-/**
- * Warps the pointer into the given client (in the middle of it, to be specific), therefore
- * selecting it
- *
- */
-void warp_pointer_into(xcb_connection_t *conn, Client *client);
-
 /**
  * Toggles fullscreen mode for the given client. It updates the data structures and
  * reconfigures (= resizes/moves) the client and its frame to the full size of the
@@ -185,9 +171,12 @@ void warp_pointer_into(xcb_connection_t *conn, Client *client);
 void toggle_fullscreen(xcb_connection_t *conn, Client *client);
 
 /**
- * Kills the given window using WM_DELETE_WINDOW or xcb_kill_window
+ * Gets the first matching client for the given window class/window title.
+ * If the paramater specific is set to a specific client, only this one
+ * will be checked.
  *
  */
-void kill_window(xcb_connection_t *conn, Client *window);
+Client *get_matching_client(xcb_connection_t *conn, const char *window_classtitle,
+                            Client *specific);
 
 #endif