added public? and acl method to s3 file and minor refactoring
Local storage: Always try to create directories, handle already existing.

This reduces the chances of races where two client try to upload the same
file.
adding tests for aws file acl and public? method
add missing HEAD Bucket request, with a basic test in there
adding support for network interfaces and public IP association (non-default VPCs) for EC2 spot instances
Revert "adding support for network interfaces and public IP association (non-default VPCs) for EC2 spot instances"

This reverts commit 69a68a1809c63701ccd8670dd6fdb64a3fe9c4cb.
Merge pull request #3175 from Mook-as/local-storage-concurrent-create-directory

Local storage: Always try to create directories, handle already existing
Merge pull request #3173 from ncri/master

added public? and acl method to s3 file and minor refactoring
Merge pull request #3185 from CpuID/master

add missing HEAD Bucket request, with a basic test in there