Cleaned up old code in 'torrent/utils/log.h'.
Added gzip output option for logs.
Added missing macro to enable stdc format macros.
Fixed logging of bitfield size memory use.
Added instrumentation for chunk memory usage.
Added cacheline alignment attribute to various hash and chunk classes that get passed to the disk thread.
Added instrumentation for how much memory is used by the hash checker.
Fixed compilation issues with clang.
Added 'ui_events' logging option.
Added logging of requested pieces.
Fixed type in IPv6 option.
Added underscores to the log messages to make it easier to parse.
Reverted code that got accidentally committed.