[ticket/11481] Move feed factory to own file

PHPBB3-11481
[ticket/11481] Move feed base to own file

PHPBB3-11481
[ticket/11481] Move feed post base to own file

PHPBB3-11481
[ticket/11481] Move feed topic base to own file

PHPBB3-11481
[ticket/11481] Move overall feed to own file

PHPBB3-11481
[ticket/11481] Move forum feed to own file

PHPBB3-11481
[ticket/11481] Move topic feed to own file

PHPBB3-11481
[ticket/11481] Move forums feed to own file

PHPBB3-11481
[ticket/11481] Move news feed to own file

PHPBB3-11481
[ticket/11481] Move topics feed to own file

PHPBB3-11481
[ticket/11481] Move active topics feed to own file

PHPBB3-11481
[ticket/11481] Move functions from feed into helper class

PHPBB3-11481
[ticket/11481] Use container for all classes and inject dependencies

PHPBB3-11481
[ticket/11481] Remove globals and use dependency injection instead

PHPBB3-11481
[ticket/11481] Move prepended slash from calls into function

PHPBB3-11481
[ticket/11543] Add unit tests for obtain_guest_count()

PHPBB3-11543
[ticket/11543] Add unit tests for obtain_users_online()

PHPBB3-11543
[ticket/11543] Add unit tests for obtain_users_online() with empty forum

PHPBB3-11543
[ticket/11543] Add unit tests for obtain_users_online_string()

PHPBB3-11543
[ticket/11543] Use correct IP addresses and inject time for correct values

PHPBB3-11543