Changes to apod.lua:

- Now uses demo key if key is not configured.
 - Removed newlines in doc.
 - Removed some unused code.

config.lua

@@ -6,7 +6,7 @@ return {
 	owm_api_key = '',
 	biblia_api_key = '',
 	thecatapi_key = '',
-	nasaapi_key = '',
+	nasa_api_key = '',
 	time_offset = 0,
 	lang = 'en',
 	antisquig = false,