updated get_latest_entries_by_language boundary checkers
removed strategy in inquirer and updated docstrings
removed strategy in news.py
removed strategy constants in config.py
copied config.py from newsman to publisher
updated inquirer.py
added clean_by_collection method
add more logic in handling dirty expired items in memory
added code_base and command_clean_memory in config.py
fixed a typo: confgi --> config
updated clean_memory.py
updated config.py s
fixed a typo: newman --> newsman
prepared to include clean_memory in inquirer.py
updated inquirer.py
finished updating get_latest_entries_by_language
reformatted after remove if-else of strategy
updated get_previous_entries_by_language
fixed a serious bug
finished updating get_previous_entries_by_language