README: Remove outdate AUR reference; remove nightly builds; add APT repo

## Installation

efa-m is available as

[perl-travel-status-de-vrr-git](https://aur.archlinux.org/packages/perl-travel-status-de-vrr-git/)

in the archlinux User Repository (AUR).

You have five installation options:

For other distributions, you have four installation options:

* Nightly `.deb` builds for Debian-based distributions

* `.deb` releases for Debian-based distributions

* finalrewind.org APT repository for Debian-based distributions

* Installing the latest release from CPAN

* Installation from source

* Using a Docker image

can run `efa-m --version` to verify this. Documentation is available via

`man efa-m`.

### Nightly Builds for Debian

### Release Builds for Debian

[lib.finalrewind.org/deb](https://lib.finalrewind.org/deb) provides Debian

packages of both development and release versions. Note that these are not part

of the official Debian repository and are not covered by its quality assurance

process.

packages of all release versions. Note that these are not part of the official

Debian repository and are not covered by its quality assurance process.

To install the latest release, run:

```

wget https://lib.finalrewind.org/deb/libtravel-status-de-vrr-perl_latest_all.deb

sudo dpkg -i libtravel-status-de-vrr-perl_latest_all.deb

sudo apt --fix-broken install

sudo apt install ./libtravel-status-de-vrr-perl_latest_all.deb

rm libtravel-status-de-vrr-perl_latest_all.deb

```

For a (possibly broken) development snapshot of the Git master branch, run:

Uninstallation works as usual:

```

wget https://lib.finalrewind.org/deb/libtravel-status-de-vrr-perl_dev_all.deb

sudo dpkg -i libtravel-status-de-vrr-perl_dev_all.deb

sudo apt --fix-broken install

rm libtravel-status-de-vrr-perl_dev_all.deb

sudo apt remove libtravel-status-de-vrr-perl

```

Note that dpkg, unlike apt, does not automatically install missing

dependencies. If a dependency is not satisfied yet, `dpkg -i` will complain

about unmet dependencies and bail out. `apt --fix-broken install` installs

these dependencies and also silently finishes the Travel::Status::DE::VRR

installation.

### finalrewind.org APT repository

Uninstallation works as usual:

[lib.finalrewind.org/apt](https://lib.finalrewind.org/apt) provides an APT

repository with Debian packages of the latest release versions. Note that this

is not a Debian repository; it is operated under a best-effort SLA and if you

use it you will have to trust me not to screw up your system with bogus

packages. Also, note that the packages are not part of the official Debian

repository and are not covered by its quality assurance process.

To set up the repository and install the latest Travel::Routing::DE::HAFAS

release, run:

```

sudo apt remove libtravel-status-de-vrr-perl

curl -s https://finalrewind.org/apt.asc | sudo tee /etc/apt/trusted.gpg.d/finalrewind.asc

echo 'deb https://lib.finalrewind.org/apt stable main' | sudo tee /etc/apt/sources.list.d/finalrewind.list

sudo apt update

sudo apt install libtravel-routing-de-hafas-perl

```

Afterwards, `apt update` and `apt upgrade` will automatically install new

Travel::Routing::DE::HAFAS releases.

Uninstallation of Travel::Routing::DE::HAFAS works as usual:

```

sudo apt remove libtravel-routing-de-hafas-perl

```

To remove the APT repository from your system, run:

```

sudo rm /etc/apt/trusted.gpg.d/finalrewind.asc \

        /etc/apt/sources.list.d/finalrewind.list

```

### Installation from CPAN