* gnu/installer/newt/help.scm: New file.
* gnu/local.mk (INSTALLER_MODULES): Add it.
* po/guix/POTFILES.in: Add it.
* gnu/installer/record.scm (<installer>): Add 'help-menu' and 'help-page'
fields,
(installer-help-menu, installer-help-page): new exported procedures.
* gnu/installer/newt.scm (init): Set the help line,
(help-menu, help-page): new procedures used ...
(newt-installer): ... here.
* gnu/installer/newt/keymap.scm (run-layout-page): Add a context argument to
differenciate the help context from the main one,
(run-keymap-page): add a context argument and pass it to run-layout-page.
* gnu/installer.scm (compute-keymap-step): Add a context argument and pass it
to 'installer-keymap-page',
(installer-steps): set the help menu and pass the appropriate context to
compute-keymap-step calls,
(guile-newt): update to revision 2.
Suppose that the keyboard model is "pc105".
* gnu/installer.scm (apply-keymap): Remove model ...
* gnu/installer/newt/keymap.scm (run-keymap-page): passed here.
(run-model-page): remove procedure
* gnu/installer/record.scm (installer): Edit keymap-page prototype in comment.
* gnu/installer/keymap.scm (default-keyboard-model): New exported parameter.
* gnu/installer.scm: Rename to ...
* gnu/installer/record.scm: ... this.
* gnu/installer/build-installer.scm: Move everything to the build side and
rename to gnu/installer.scm.
* gnu/installer/newt.scm: Remove all the gexps and add depencies to newt
modules as this code will only be used on the build side by now.
* gnu/local.mk (GNU_SYSTEM_MODULES): Adapt it,
(dist_installer_DATA): New rule to install installer's aux-files.
* gnu/system/install.scm (%installation-services): Use only
'installer-program' from (gnu installer). The installer is now choosen on the
build side.
* guix/self.scm (*system-modules*): Restore previous behaviour and add all
installer files to #:extra-files field of the scheme-node.
* po/guix/POTFILES.in: Adapt it.
