Refactor to use source-map-explorer, enabling usage with Ember CLI, ember-auto-import and Embroider

[simonihmig]

Closes #24

To Do:

• Test rebuild
• Assert for working sourcemap settings (ember-cli + ember-auto-import/webpack)
• Filter out webpack://__ember_auto_import__/ - possible?
• Test CSS sourcemaps
• Test Embroider
• Docs

[evoactivity]

Just ran this branch on my app but it only seemed to output for my CSS files. Is this currently expected? (considering it's a WIP)

[simonihmig]

Is this currently expected?

No, certainly not. I tested it with the addon's dummy app, and was working. Maybe you have sourcemaps disabled?

[evoactivity]

No I have them enabled explicitly, I can see stats have been generated in the concat-stats-for directory but no JS is shown in the output from source-map-explorer. I've tried on a different app and see the output I'd expect so definitely something in my app breaking it.