The phpbb_root_path needs to be removed from the style path, before giving
the path to the finder, because the finder prepends it later again and is
therefor unable to find style files when the root path is not ./
PHPBB3-10844
Changing set_templates() to set_style() and removing second parameter, changing get_main_template_path() to get_main_style_path(), removing template_root_for_style(), updating docblocks
PHPBB3-10632
Changing template classes prefixes from phpbb_template to phpbb_style (for classes that will work with styles) or phpbb_style_template (for classes that are specific to templates)
PHPBB3-10632