Allow erizo connections to hostnames and via SSL.

In order to get around CORS requirements, it's helpful to be able to
connect by a DNS name instead of an IP address. Allow the hostname
provided in tokens to be configurable. Also allow setups where something
like nginx fronts erizo_controller and provides SSL termination.
Merge commit '72aeb39' into gene_testing_3

Conflicts:
	erizo_controller/erizoClient/src/Room.js
	nuve/nuveAPI/resource/tokensResource.js
	scripts/licode_default.js