add missing scratchpad.{c,h}

include/scratchpad.h

@@ -0,0 +1,33 @@
+/*
+ * vim:ts=4:sw=4:expandtab
+ *
+ * i3 - an improved dynamic tiling window manager
+ * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
+ *
+ * scratchpad.c: Scratchpad functions (TODO: more description)
+ *
+ */
+#ifndef _SCRATCHPAD_H
+#define _SCRATCHPAD_H
+
+/**
+ * Moves the specified window to the __i3_scratch workspace, making it floating
+ * and setting the appropriate scratchpad_state.
+ *
+ * Gets called upon the command 'move scratchpad'.
+ *
+ */
+void scratchpad_move(Con *con);
+
+/**
+ * Either shows the top-most scratchpad window (con == NULL) or shows the
+ * specified con (if it is scratchpad window).
+ *
+ * When called with con == NULL and the currently focused window is a
+ * scratchpad window, this serves as a shortcut to hide it again (so the user
+ * can press the same key to quickly look something up).
+ *
+ */
+void scratchpad_show(Con *con);
+
+#endif