v1.02

• Better error logging in the cache body writer (thanks @hamishforbes)
• Broken entities (e.g. some keys missing under memory pressure) are now cleaned up on discovery.
• Bugfix: Zero length bodies were no longer being cached.
• Bugfix: Responses which have become non cacheable would cause an immediate delete, even though concurrent requests may be reading from them. Entity deletion is now deferred to garbage collection instead.