[Socket] Read raw stream when using Socket server (no stream)
Added comment to Socket Conn socket reading
fix typo
Merge branch 'raw-server-fix'

* raw-server-fix:
  fix typo
  Added comment to Socket Conn socket reading
  [Socket] Read raw stream when using Socket server (no stream)
Removed ExtEventLoop
Merge remote-tracking branch 'jmalloc/next-tick'
[EventLoop] Remove pecl-event from .travis.yml.

This is not needed right now as it should be part of a different PR
introducing the new ExtEventLoop class.
Update CHANGELOG.
Added `ExtEventLoop`.