AWS Identity and Access Management (IAM) support.

This commit adds support for the following AWS IAM actions:

- CreateAccessKey
- CreateUser
- DeleteAccessKey
- DeleteUser
- DeleteUserPolicy
- GetUserPolicy
- ListAccessKeys
- ListUserPolicies
- ListUsers
- PutUserPolicy
- UpdateAccessKey
- UpdateUser

Added self to contributors.
Merge pull request #80 from abhinav/iam

AWS Identity and Access Management (IAM) support.
travis: use ghc 7.6.3
not sure why the 7.6.3 travis build failed
relax cryptohash constraint (finally tested)
Release 0.8.3
http-conduit 2.0 support
Revert "travis: use ghc 7.6.3"

This reverts commit 4400dc142512bfc2f2157aaa1080e6aa5a300640.

Conflicts:
	.travis.yml
Merge pull request #83 from snoyberg/master

http-conduit 2.0 support
Release 0.8.4
Initial DynamoDb support
Move V4 authorization into Aws.Core
DynamoDb: change the memory responses to return the table description directly
Merge pull request #86 from wuzzeb/master

DynamoDb
add Chris Dornan and John lenz to contributors
Australia is a country too
Merge pull request #87 from maxpow4h/patch-1

Australia is a country too
Added SSE to S3

Use by setting S3.poServerSideEncryption = Just "AES256"
Merge pull request #88 from maxpow4h/sse

Added SSE to S3
Added type for ServerSideEncryption