2022-??-??:
	- *check_feeds() functions should use less file I/O now.

	  json_save_entries() *IS* triggered per post.
	  5 new posts = writing 5 times to _entries file
	  That's a lot of I/O. Place json_save_entries()
	  somewhere else in the loop to save I/O.
	  Idea:
		Make a variable to check if anything has been
		added to the entries[] list, then decide
		whether to use json_save_entries()

		Maybe use a database instead?
		But files are easy... Do we care about disks?

2022-04-21:
	- The bot will now populate empty entries[] list
	  if feeds are present.
	  
	  This is helpful, if something happens to the
	  _entries file, then the bot will try
	  to "regenerate" it so that it won't spam every
	  possible group with all the posts ever created.

	- General function "debug_message()" has been added.
	
	  So far print() was used to output text.
	  It is a lame and lazy "debugging". It is still
	  used but in a debug_message() "wrapper". If later
	  I would like to add proper "debugging", all
	  I have to do is to change debug_message() function
	  and all the "internal" messages will update.

	- /list command will now return "prettier" list.

	  Till this moment, the bot returned a python list
	  of all the feeds followed. It did not look nice.
	  Now, a proper "list" will be returned with
	  each feed per line.

	  Bonus: /list did not inform when no feeds
	  were followed. Now it will.

	- *check_feeds() functions will not duplicate hashes.

	  There was a flaw where a hash has been added multiple
	  times to the entries[] list. It was because
	  entries.append(hash) was triggered per group message,
	  rather than per post. 
	  (It was placed inside a wrong loop)
	  It has been corrected.