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
rework query_builder to use golang json marshaller, fixes bugs relating to quoting (e.g. attribute value with double-quote character - work done by Mark Boyd
Merge pull request #47 from jbert/master

Switch to using the built-in encoding/json marshaller for query building (work done by Mark Boyd)
Fixing s3 Exists
Removes examples because they were causing
tests to fail.
dynamodb: Fix AddUpdates() to build UpdateItem() query properly

See also: http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_UpdateItem.html
dynamodb: go fmt
Merge pull request #48 from nabeken/dynamodb-fix-update-item

dynamodb: fix broken query for UpdateItem
Add USGovWest region
Added ability to query block devices of EC2 instances. Added ability to specify block device mappings when creating EC2 instances
Merge pull request #49 from darrendao/master

Add USGovWest region
Adding Exists tests
Merge remote-tracking branch 'upstream/master'
Merge pull request #50 from drocamor/master

Fixing issues with S3 Exists
Added additional method to send custom headers with GET request

Also split GetReader method into GetReader and GetResponse methods to
allow raw responses to be requested by the user.
Merge pull request #52 from Ainsleh/s3GetResponse

Added additional method to send custom headers with GET request
Adding .gitignore
Remove signpath from request type.

The signpath wasn't being processed in prepared.  It could be replaced
by a local variable.
Adding website to subresource parameter list