This makes it easier to filter by a paired tag key and value:

   ec2.instances.with_tag('key', 'value')

The #with_tag method provides an alternative the following:

   ec2.instances.filter('tag:key', 'value')

…hardcoded strings in a file

Route53 rerturns a NoSuchHostedZone error when you attempt
to describe a non-existant hosted zone.  This call was being
used to implement #exists? but it was not rescuing the error.

Fixes aws#543

This adds support for the EC2 2014-05-01 API version.
The `AWS::EC2::Client#copy_snapshot` method will automatically
populated the `:destiation_region` and `:presigned_url` params
for the user to enable copy snapshot on encrypted volumes.

…served.

Fixes aws#544

Amazon S3 now enables specifying a lifecycle configuration on versioned
buckets. Versioning provides protection against overwrites and deletes
by enabling you to preserve, retrieve, and restore every version of
every object in an Amazon S3 bucket. Using lifecycle rules, you can
automatically control the cost of storing multiple versions of your
objects.

Additional response data returned from the AssumeRoleWithSAML operation
in the AWS Security Token Service allows you to access information on
the subject, subjectType, issuer, audience, and nameQualifier for an
assumed role.

Includes Hebrew language support, and you can set the desired partition
count option to preconfigure the number of index partitions for a domain
that uses the m2.2xlarge search instance type.

This was regressed here: aws@93b6ddb

Fix comment on WorkflowExecutionCollection#with_status and #count

…collection

Modified document of `option[:instance_tenancy]`

Add DBSecurityGroupName to AuthorizeDBSecurityGroupIngress

Clarify log_level configuration docs

…r-chain

use default credential provider in samples

Fixes aws#538

According to
http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectPUT.html

to enable redirect on an S3 object it needs to have
'x-amz-website-redirect' metadata key with new location value.

When creating an object like so:

```ruby

bucket.object['foo'].write('', metadata: { "x-amz-website-redirect" =>
"http://example.com" }, acl: :public_read )
```

`x-amz-website-redirect` gets prepended with `x-amz-meta-` prefix thus
breaking the redirect feature.

This also affects any other meta data key which starts with 'x-amz'.

Includes message attributes support.

…id param name

…ed_zone id param name

…ion.

…ead of Digest::MD5

s/erxisting/existing/

Correct EC2Provider expiration timeout

Fix a typo in add_queue_message.rb

References:
  aws#670, aws#671

AWS::SQS::Queue - use OpenSSL for Digest needs