Merge pull request #24 from ImAlsoGreg/master

Add explicit imports
Add support for network-2.5.
Update transformers dependency
Allow attoparsec 0.12. Closes #26.
Move the changelog to a file.
Restore 100% test coverage.
Commit failing test for #27.
Make 'makeOutputStream' close the stream after getting EOF. Closes #27.
Bump version.
Force the argument even after EOF in makeOutputStream.