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