Adding security token handling
Using named parameters on Credentials
Token usage example in README.
go fmt
Adding STS support to S3
Fixing description of test
Adding STS support to v3 signatures
Adding SimpleDB integration test

The EC2 request was always succeeding and I needed a better test of the
v2 signature. This passes with IAM creds, but fails with STS creds.
This is expected.
Support for STS on v2 requests
Merge pull request #6 from drocamor/master

Adding security token handling