docs: update README Linux dependency instructions

Fixes #176

README.md

@@ -216,7 +216,7 @@ For a detailed installation documentation of [pyzbar](https://github.com/Natural
 
 #### Linux (Debian, Ubuntu, …)
 
-    sudo apt-get install libzbar0
+    sudo apt-get install libgl1 libzbar0
 
 #### Linux (OpenSUSE)
 
@@ -224,8 +224,7 @@ For a detailed installation documentation of [pyzbar](https://github.com/Natural
 
 #### Linux (Fedora)
 
-    sudo dnf install mesa-libGL
-    sudo dnf install zbar
+    sudo dnf install mesa-libGL zbar
 
 #### Linux (Arch Linux)
 
@@ -733,6 +732,17 @@ Options:
 -h, --help              Show help and quit
 ```
 
+#### Additional requirements
+
+* envsubst
+* git
+* perl
+* pip
+
+##### Fedora
+
+sudo dnf install python3-pip perl envsubst
+
 ## Technical background
 
 The export QR code of "Google Authenticator" contains the URL `otpauth-migration://offline?data=…`.

example_keepass_output.hotp.csv

@@ -1,2 +1,2 @@
-Title,User Name,HmacOtp-Secret-Base32,HmacOtp-Counter,Group
-,hotp demo,7KSQL2JTUDIS5EF65KLMRQIIGY,4,OTP/HOTP
+Title,User Name,HmacOtp-Secret-Base32,HmacOtp-Counter,Group
+,hotp demo,7KSQL2JTUDIS5EF65KLMRQIIGY,4,OTP/HOTP

example_keepass_output.totp.csv

@@ -1,6 +1,6 @@
-Title,User Name,TimeOtp-Secret-Base32,Group
-raspberrypi,pi@raspberrypi,7KSQL2JTUDIS5EF65KLMRQIIGY,OTP/TOTP
-,pi@raspberrypi,7KSQL2JTUDIS5EF65KLMRQIIGY,OTP/TOTP
-,pi@raspberrypi,7KSQL2JTUDIS5EF65KLMRQIIGY,OTP/TOTP
-raspberrypi,pi@raspberrypi,7KSQL2JTUDIS5EF65KLMRQIIGY,OTP/TOTP
-,encoding: ¿äÄéÉ? (demo),7KSQL2JTUDIS5EF65KLMRQIIGY,OTP/TOTP
+Title,User Name,TimeOtp-Secret-Base32,Group
+raspberrypi,pi@raspberrypi,7KSQL2JTUDIS5EF65KLMRQIIGY,OTP/TOTP
+,pi@raspberrypi,7KSQL2JTUDIS5EF65KLMRQIIGY,OTP/TOTP
+,pi@raspberrypi,7KSQL2JTUDIS5EF65KLMRQIIGY,OTP/TOTP
+raspberrypi,pi@raspberrypi,7KSQL2JTUDIS5EF65KLMRQIIGY,OTP/TOTP
+,encoding: ¿äÄéÉ? (demo),7KSQL2JTUDIS5EF65KLMRQIIGY,OTP/TOTP