* LICENSE: Add GPLv3.

* basic.el (durand-enlarge-window):
(durand-shrink-window):
(durand-enlarge-window-horizontally):
(durand-shrink-window-horizontally): Now I can easily maximize or
minimize windows.

* comb/orderless-conf.el ("orderless"): Now I try to use my own
completion framework.

* common.el (durand-embark-scroll-down-or-go-to-completions):
(durand-embark-scroll-up-or-go-to-completions):
(durand-completion-scroll-down-or-go-to-minibuffer):
(durand-completion-scroll-up-or-go-to-minibuffer): Move these
functions here since they do not belong to the completion framework in
my opinion.

(register):
(register-val-jump-to): Rewrite this method so that it does not have
to ask me if I want to open a file while jumping.

* completion-conf.el: My intended completion framework, which is still
work in progress.

* init.el ("comb/orderless-conf.el"):
("completion-conf.el"): Adjust things accordingly.
("durand-simple"): My custom functions for viewing and for opening
things.

* modeline.el (modeline-propertize):
(modeline-format-minor-modes):
(modeline-format-major-mode): Now the macro `modeline-propertize'
won't override properties that it does not intend to define. This has
the effect that the properties of the original constructs will go
through and have effect.
(modeline-format-main): Make sure the space has a positive length.
(modeline-format-buffer-name): Make sure the length does not exceed
half the width of the window.

In the course of configuring Emacs there are numerous changes to make.
This is one regular step.

Now I got almost every functionality that we need, including pdf,
mu4e, magit, et cetera.

I can build the suffix trees for strings.

But there are some problems when the string shows some hitherto
unknown pattern.