Fixed the S3 provider to support all regions, changed the format of the s3 urls to include s3 endpoints (breaking change).
Merge branch 'master' into s3-artifact-deploy
Improved the way the s3 region was configured on the sdk
Merge pull request #90 from jonathanq/s3-artifact-deploy

Fix S3 code to support all regions (and not just US Standard buckets)
use nexus_cli 4.0.0 and new syntax
Merge branch 'master' into nexus_configurations

Conflicts:
	libraries/chef_artifact.rb
update readme with new options