Merge pull request #333 from aydany/master

Fix memory leak when init_asio fails
code style and whitespace
pass better information about TLS handshake failures
Merge pull request #334 from aydany/master

Avoid leak when stopping server
whitespace and don't accept if we know the transport isn't listening references #334
Merge remote-tracking branch 'upstream/master'

Conflicts:
	websocketpp/roles/server_endpoint.hpp