Made it possible to add Expires and Cache-Control meta data to AWS S3 calls
Fixes #138
Merge pull request #148 from GrahamCampbell/cache

Fixes #138
Fixed indentation
Merge pull request #149 from GrahamCampbell/fixes

Fixed Indentation
Added configurable array to AbstractFtpAdapter
Merge branch 'master' of github.com:thephpleague/flysystem
Added correct type hints in dropbox adapter
Added missing  property
Added default result value for Ftp createDir
Fixed typo
Merge pull request #151 from GrahamCampbell/cache

Fixed Typo
Merge branch 'master' into S3_multipart_concurrent

Conflicts:
	src/Adapter/AwsS3.php