Merge pull request #1 from djce/master

"list" to show object size and bucket size
Do not stack trace AmazonClientException.
Remove redundant return.
Upload with new name.
fix it.
Can specify chunk size.
Outline for WatchUpload.
Dir watching code bulk.  Switch to Logback for nicer formatter.  Use
logger as it shows thread name with msgs.
tweak logging
Option to delete after watch upload.
simpler logging.
put tasks in tasks package.  prgtracker in utils.
logging and protect against vanished files
ignore dirs and .part files
Retry loop catches Exception just to be sure.
Log prg every 10 seconds.
Reschedule uploads when they fail.
Log executor queue depths every 10 seconds.
Do not log transfered=0
Loging tweaking.