simplify the accounting of active_download and active_finished torrents
merged makefile fixes from RC_0_16
mar 0.16.8 release in changelog
merged rename_file fix from RC_0_16
merged unit test fixes from RC_0_16
merged streaming fix from RC_0_16
merged file error handling from RC_0_16
merged sparse file fix from RC_0_16
merged identify_client update from RC_0_16
merged time critical piece fix from RC_0_16
merge asio-debugging fix from RC_0_16
merged documentation fix from RC_0_16
separate anonymous mode and force-proxy mode, and tighten it up a bit
anonymous mode should default to false. minor fixes
merge need_save_resume patch from RC_0_16
merge change from RC_0_16
extend unit tests
make some stats more configurable and reorder some fields
use upper case hex digits in tracker key
don't send ipv4 and ipv6 to trackers