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
Removed possibility of other sse values
Merge pull request #89 from maxpow4h/sse-t

Added type for ServerSideEncryption
bump case-insentive and prepare release
fix problem caused by (now) superfluous usage of ResourceT
prepare 0.8.6
conduit 1.1