Add deep linking into methods/views

[brendankenny]

It would be amazing to deep link directly into specific views for artifact files loaded from the web (e.g. in gists).

Method name, view pane, and even line number (with disassembly state and selected or not eyeball guy) would be great for sharing specific places and issues in some code.

This would probably be easiest by using some Dart router library rather than expanding the current regex approach in hydra.dart. It seems like there's a number of them.