Updated lua/podolsk/metainfo.lua to comply with the demands of our contributors.

Removed an unused song.

Our Father who art in heaven,
hallowed be thy name.
May the radio work properly.

Amen.

Gee I hope the radio works fine now

Added a navmesh (thanks CoreOrᴀnge!)
Made the radio a bit better

previous update didn't change anything; this one does

improved the radio by using a different sound flag; sound should pause with the game now

possibly fixed lua/entities/sent_podolskradio.lua:259: bad argument #6 to 'EmitSound' (number expected, got table)