Fully compatible with async/await

Make sure the asyncio.coroutine decorator is used by all pulsar coroutines
This allows to use pulsar to write python 3.5 compatible code with the
async/await syntax. 709f9ff

Documentation

• Mcve reference in the readme b49434d
• Removed CHANGELOG.rst from the top level directory and created a folder inside
  the docs which contains a list of minor releases
• Started using markdown in documentation. 6b20825

Http

• Better keep-alive management of HTTP connections df1be4b
• Http client uses the base class connection method rather than using a
  different one b584828
• The http response object has the links attribute which return a parsed
  Links headers dictionary. Code from python requests 023ca50

Wsgi

• Use file_response function in MediaMixin.serve_file method c012af1
• FileRouter is now a proxy for MediaRouter