Mark API keys as optional in README
Mark API keys as optional in README

moneypenny/seasonal-playlister,cheshire137/seasonal-playlister,moneypenny/seasonal-playlister,cheshire137/seasonal-playlister,cheshire137/seasonal-playlister,moneypenny/seasonal-playlister,cheshire137/seasonal-playlister,moneypenny/seasonal-playlister