polish/napi: Add new port
"napi.sh" is a napiprojekt.pl client written in Bash. The purpose of
the project was to create simple tool for systems with very limited
resources (NAS QNAP drives, Synology, OpenWRT routers, Popcorn
streamers, etc). It was inspired by "pynapi.py" script.
"napi.sh" is distributed together with automatic subtitle format
converter "subotage.sh" created specially for "napi.sh". "subotage.sh"
is written in Bash and uses awk for text processing.