Modified the traces view to display traces

At the moment, it's fairly rudimentary. Eventually, I would like to have it sorted by date, and simulation run name.
For now, traces are not associated with a simulation run, so this isn't actually possible.

It might also be nice to have a degree of syntax highlighting in the trace, but this would require the creation of another mode for ace.js.
This is possible, but might be quite hard work.