Merge pull request #24 from ewah/master

add s3-recheck option
Deepcopy to copy.
Merge branch 'master' of github.com:danilop/yas3fs
Adding default headers to get bucket call.
S3 Requester Pays fix.
Fix for S3 objects without correspoding folder(s).
Move/rename dirs now works recoursively to keep the cache updated.
Move/rename dirs now works recoursively to keep the cache updated.
Move/rename dirs now works recoursively to keep the cache updated.
Move/rename dirs now works recoursively to keep the cache updated.
Move/rename dirs now works recoursively to keep the cache updated.
Move/rename dirs now works recoursively to keep the cache updated.
Move/rename dirs now works recoursively to keep the cache updated.
Move/rename dirs now works recoursively to keep the cache updated.
Move/rename dirs now works recoursively to keep the cache updated.
Move/rename dirs now works recoursively to keep the cache updated.
Move/rename dirs now works recoursively to keep the cache updated.
Fix to unlink directories without an object on S3.
Fix to unlink directories without an object on S3.
split do_cmd_on_s3_now to do_cmd_on_s3_now_w_retries
added withplugin.