General bugfixes. README updates. See commit log for changes.

General bugfixes. README updates.

Unicode files and directories
Added deleting and is_busy flag
Changed *xattr userspace
Recovery Plugin module
AWS managed encryption option
New queue w/ hostname option
download retries option
Publish message 'reset' now takes path
st_blksize option for faster writes
overriding boto's base key class for unicode support and bigger read blocks.

General bug fixes, especially those in file creation/deletion currency, multipart uploads.

Fix to unlink directories without an object on S3.

Fixed support for directories that have no object on S3.
Move/rename dirs now works recoursively to keep the cache updated.

S3 Requester Pays fix.

Multipart upload fix.

S3 write back upload + fixes.

Added:

• read only mount
• S3 Requester Pays support

Writeback works with deleted/rename keys.
Get key cache optimization.