Hello Stefan this is
not exactly an "issue"
but rather a request to
add installation details for the use of the
library without being obliged to
use "composer".
One could have reasons
(or issues) in not using it

I have found the following post

http://stackoverflow.com/questions/30011230/how-to-use-piwik-device-detector-in-php-project

but I'm not sure it's correct
(also, there is not a spyc.php file
in my folder)

and I would love some "official"
advice on your part

thank you and kind regards
Thomas