build: hooks: set firefox as default www browser
build: include binary deb packages in packages.chroot as a git submodule
build: add preseed file for chroot
update README link to doc
doc:more alternative packages and links
skel: add audacity config and theme
skel: add quodlibet/exfalso config
skel: add unison common config (meld as mergetool)
skel: add stellarium config
skel: add moc config and themes
skel: add gimp 2.8 config
skel: add elinks config
skel: add mplayer placeholder input.conf to get rid of warnings
skel: add ssh client config
skel: add skippy-xd config
skel: add xscreensaver config
skel: add .Xresources (mostly xscreensaver font config)
skel: add linphone config
skel: add global git config and aliases
skel: add bash config and aliases