Merge pull request #79 from tim93422/master

Added sample program using SQS
relax cereal bounds
Release 0.8.2
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
Revert "travis: use ghc 7.6.3"

This reverts commit 4400dc142512bfc2f2157aaa1080e6aa5a300640.

Conflicts:
	.travis.yml