Added ListMetrics method
Removed Namespace from the constructor as not all AWS API method needs it
and for methods like ListMetrics you could need to call the method without
a Namespace to list all available metrics
fixed list_metrics.go in the examples dir
Removes examples because they were causing
tests to fail.
added SendMessageWithDelay
Fix Dimensions and Stats prefixes

There was a dot missing which resulted in this error message when
trying to put custom metrics:

Type: Sender, Code: MalformedInput, Message: Key MetricData.member.1Dimensions.member.1.Name must be all numbers if it starts with an integer
updated typecast, set type int64 for delay
fixed typecast
Merge pull request #55 from rkononov/master

added SendMessageWithDelay
dynamodb: return TableStatus from TableDescription
dynamodb: Add DeleteTable API support
Added the missing '.' in Dimensions marshalling
Merge pull request #58 from levb/master

Added the missing '.' in Cloudwatch Dimensions marshalling
Merge pull request #57 from nabeken/dynamodb-delete-table

Add Dynamodb DeleteTable API support
Merge pull request #56 from viru/patch-1

Fix Dimensions and Stats prefixes
Merge pull request #46 from cfsalguero/cloudwatch_listmetrics

Cloudwatch listmetrics
dynamodb query uses auth token if available
Merge pull request #59 from dylanmei/dynamodb_query_security_token

DynamoDB query uses auth security token if available
travis-ci: Add Go 1.2
s3: Do not assert actual size in content-length for HEAD

A value of Content-Length returning with HEAD in net/http is now actual
content size from Go 1.2 but not Go 1.1.

See https://code.google.com/p/go/source/detail?r=3a388be1862ee310ec0036e3bc5bceeaf30ce315&path=/src/pkg/net/http/server.go

Fix to assert only its type to pass tests for 1.1 and 1.2.
Merge pull request #60 from nabeken/go-1.2-s3

travis-ci: Add Go 1.2