-convert to inline callbacks
-return more errors than just timeouts
-delete on timeout
-have a more understandable return condition (first data blob having
downloaded)
-remove ManagedEncryptedFileDownloader._reupload
-clean up reflector functions in Daemon, move to reflector.reupload
-check ConnectionLost in reflector client
-close sd blob file handle when it wont be sent (otherwise read handle stays open)
-log reflector sd info
-give reflector client factory a lbry file
In the next commit I change conf.settings to be initialized
at runtime instead of load time and so any import of
`from lbrynet.conf import settings` will be and stay None if
it happens before the initialization.
