Remove links to release notes
Briefly explain streams and promises in README
Replace logo with real pixel art by @julien-c, close #153

Slightly modified version of the original PR. The ends of the h are a bit
longer.
Make CHANGELOG render properly
Make CHANGELOG render properly (amendment)
Update git-subsplit
Fix socket-client composer.json
[SocketClient] Remove ConnectorInterface::createUdp

It does not make sense to represent UDP as a stream. Streams have end
semantics, UDP does not.
[SocketClient] Rename Connector::createTcp to Connector::create
CS
Disable libev on travis

It's currently failing with strange build errors.
Update deps
Merge branch 'master' into travis-disable-libev

* master:
  Update deps
  CS
Move libevent and libev form require-dev to suggest
Merge branch 'refs/heads/travis-disable-libev'