As per private email to Raymond, I would like to move the lru_cache access attributes and methods into a CacheInfo class, exposed as a "cache" attribute with several methods and read-only properties.

Read-only properties: hits, misses, maxsize
Methods: clear(), __len__()

As an implementation detail, cache_misses and cache_hits become nonlocal variables rather than attributes of the wrapper function.

Priority set to high, since the current API will be locked in as soon the first beta goes out.