src/clfswm-internal.lisp (place-frames-from-xinerama-infos): Handle root screen resize on the fly when adding or removing a monitor.

src/clfswm-menu.lisp (open-menu): Show key bindings correspondence in menu for main and second mode.

src/tools.lisp (add-new-hook, add-hook): New macro. Do not duplicate hooks by default. Use add-new-hook if you want to duplicate them.

src/clfswm-internal.lisp (delete-child-and-children-in-all-frames): Delete or destroy children before displaying all children.

src/clfswm.lisp (main-unprotected): Destroy all frames windows before closing the display (not really needed).

src/clfswm-expose-mode.lisp (define-expose-letter-keys): Add 0..1 and A..Z keys to select a child in expos mode.

src/clfswm-nw-hooks.lisp (make-permanent-nw-hook-frame): New function. Prevent to add or delete a new window hook for this frame.

	* src/clfswm-pack.lisp (implode-frame, implode-current-frame): New functions. Absorb all frames subchildren in frame. Explode frame opposite.

src/clfswm-layout.lisp: Add a variable border size for frames and windows. contrib/volume-mode.lisp (set-default-volume-keys): Add more keybindings (up/down, right/left) to raise/lower the volume.

src/clfswm-configuration.lisp (create-configuration-menu): Change the config system with a more lispy one and a less string based one: (defconfig name value group doc).

src/xlib-util.lisp (move-window,resize-window): Add a *color-move-window* border when moving or resizing a window.