This should have been done from the beginning; the model manager
pulls models by their symbolic names. So far, we've used the source
for that, but that assumes that two modules always have different
sources, and that is absolutely not necessarily the case.
For example, internal local bundles will each be a model, but have
the same ('local') source. They should still be differentiated in
the manager by their names, but the source should state clearly that
it is local.
For this, the models now have "getName" method and the name is
created separately from their source. Items also preserve a
reference to their parent's symbolic name so they can provide
that for items that require the controller to manipulate a specific
model.
Change-Id: I8c39d5d28383d11fb330addce21e07d5c424da6f
Changing the way Echo's front-end architecture works to work with
model-view-controller methodology.
Change-Id: I97862402c41bc04dd41cd08d79f19ff677340249
