Inclide README.md in package (and bump version for re-release).

Bump version and update changelog.

Merge pull request haskell#30 from aslatter/aslatter-test-multi-version

Test against multiple GHC versions in Travis CI.

Update version and changelog for 3.1.8 release.

Update changelog.

Update changelog.

3.1.5

3.1.3

3.1.2

3.1.1