first draft of an install script
moved functions into separate file
install git later in the process
changed method to install apt gpg key
activate B.A.T.M.A.N. module
allow to skip phase 1 of installation (repo+tools)

usage: SKIP_PHASE1=Y sudo -E ./install.sh
configure fastd (mesh vpn)
prepare temporary dir in any case
don't embed files, have them in files/ subdirectory
allow to skip phase2, too
introduced info() for status messages
request config file
added autoupdate_peers.sh
add network configuration to install script
install script: get VPN peers via git

(generate ssh-key if necessary)
install script: configure system services
ToDo-Marker
fixed wrong filename
autoupdate_peers.sh: use ssh-key on gateways for fetching
fastd config: add gluon's cipher