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

This closes ticket #39

include/client.h

@@ -0,0 +1,47 @@
+/*
+ * vim:ts=8:expandtab
+ *
+ * i3 - an improved dynamic tiling window manager
+ *
+ * (c) 2009 Michael Stapelberg and contributors
+ *
+ * See file LICENSE for license information.
+ *
+ */
+#include <xcb/xcb.h>
+
+#include "data.h"
+
+#ifndef _CLIENT_H
+#define _CLIENT_H
+
+/**
+ * Removes the given client from the container, either because it will be inserted into another
+ * one or because it was unmapped
+ *
+ */
+void client_remove_from_container(xcb_connection_t *conn, Client *client, Container *container);
+
+/**
+ * Warps the pointer into the given client (in the middle of it, to be specific), therefore
+ * selecting it
+ *
+ */
+void client_warp_pointer_into(xcb_connection_t *conn, Client *client);
+
+/**
+ * Kills the given window using WM_DELETE_WINDOW or xcb_kill_window
+ *
+ */
+void client_kill(xcb_connection_t *conn, Client *window);
+
+/**
+ * Checks if the given window class and title match the given client
+ * Window title is passed as "normal" string and as UCS-2 converted string for
+ * matching _NET_WM_NAME capable clients as well as those using legacy hints.
+ *
+ */
+bool client_matches_class_name(Client *client, char *to_class, char *to_title,
+                               char *to_title_ucs, int to_title_ucs_len);
+
+#endif