merged fix from RC_0_16
merged fix from RC_0_16
fix typo in move_storage
fix move_storage fail_if_exist logic. First check to see if the root folder exists, as an early exit
merged fixes from RC_0_16
merged changes from RC_0_16
update email in set_version and update changelog
use 16-bit settings indices
introduced a new alert torrent_update_alert, for when a torrent_handle changes info-hash
debug invariant checks for DHT observer allocator
merged changes from trunk
fix merge mistake
fix assert
merge changes from trunk