Mutliple delegations for binding.sca

I've come across a situation where I'd like to support multiple remote delegations for a single binding.sca instance. This came up because I was looking at a situation where I wanted to support reliable and non-reliable comms at the same time so thought I would experiment with delegating to different underlying binding implementations. Currently the code doesn't allow you to do that as it assumes a local delegation and a single remote delegation are represented by the single binding.sca instance take from the component model.

I've attached a patch with a fix to make this work. It creates a new endpoint for each required delegation. Am going to raise on the dev list before committing.