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.
Merge pull request #8 from tweag/authmethod

AuthType refactoring
Merge branch 'master' into indentation

Conflicts:
	src/Network/Transport/ZMQ/Internal/Types.hs
Specify explicitly GHC version that Travis should use.

GHC 7.6 only enabled for now. GHC 7.4 commented out, as would need to
remove LambdaCase to port to that version.