Changed amazon s3 adapter to create a real directory
Changed amazon s3 adapter to create a real directory

sohelrana820/flysystem,mhlavac/flysystem,mhlavac/flysystem,nao-pon/flysystem,CarsonF/flysystem,sachintaware/flysystem,dshafik/flysystem,farmisen/flysystem,mapyo/flysystem,oswaldderiemaecker/flysystem,twistor/flysystem,dstockto/flysystem,barryvdh/flysystem,hannesvdvreken/flysystem,Amrit01/flysystem,concrete5/flysystem,rossriley/flysystem,twistor/flysystem