Enhancement: Removed locks if thread-concurrency is possible without it
Enhancement: Added "is_cached()" to "CachedFile"
Enhancement: Added support for Python's "__initializing__" behavior
Enhancement: Added runtime exceptions for different use cases
Enhancement: Added "filter_unique_list" to "InputFilter"
Fix: Use the parent directory of "pas_core_log_pathname" to verify that
we can write content to it
Fix: Removed misbehaving caching algorithm in "L10n"
Fix: Use the correct variable in "unregister" of "Watcher"