Fix URL for logo.
Make module headers consistent.
Move Type.hs inside Internal.* hierarchy.
(Utils.hs) Move inside Internal.* hierarchy.

This mirrors the network-transport-tcp package where various TCP utility
functions are defined in an Internal.hs module.
Trailing whitespace.
Missing copyright header.
Merge pull request #5 from tweag/code-cleanups

More metadata cleanups
Merge branch 'master' into move-modules
Add Hackage version shield and use SVG shields for Travis CI.
Initial Travis CI support.
Remove renduntant LANGUAGE pragma.
Data declaration indentation.
Remove dead code.
design notes typos and grammar.
More indentation.
Rename ZMQAuthType to AuthMethod.
Map the identity authentication method to Nothing, hence removing NoAuth.
Data declaration indentation and make module export indentation consistent.

This makes the indentation conform to the style guide.
Remove dead code.
design notes typos and grammar.