Yes, http://openlayers.org/en/v3.0.0/examples/loader.js will load all the raw files -- basically by writing out a bunch of script tags. As @lexicore has already said, you can get the source from github, though this involves setting up nodejs locally to run (which actually isn't that painful, but more so than just debugging from a hosted source). Take a look at package.json to get a feel for how much has gone into OpenLayers 3.
If you go to the OpenLayers 3 examples, for example animation, change production to development in the drop down, and then do view source, you will get the link above. You can also see all the raw js files in the Javascript console.
EDIT: I put some instructions, following the official OL dev page, on how to build/run locally, which will also get you the unminified OL source code