Replace link to Haskell wiki with link to official CH site.
Replace link numbers with symbolic names.

This is more maintainable since easier to detect dead or confused links
through inspection.
Remove "recent" - presentation linked to not so recent anymore.
Delete trailing whitespace.
Link to HdpH project, which reuses the transport layer.
ZeroMQ, openSSH links.
typos.
Replace reference to #HaskellTransportLayer chan to #haskell-distributed.
Merge pull request #9 from tweag/development

Documentation (proofreading) fixes. Thanks @mboes!