Set sci ns to mirror JVM ns

[mk]

Closes #362.

[mk]

UI tests are green now but there's still issues e.g. with the slideshow viewer in the static build but that doesn't trigger a ui test failure because the render error doesn't log an error to the console atom.

As we can see in the commits to fix the ui tests, this is currently a breaking change. I'm thinking about keeping it this way though, because I think on the flip side, things are much clearer in the long term because there's no more question about what the v alias points to.

The breaking change has now happened in #410 (and the old aliases will probably still be revived before a release).

[mk]

Need to follow up with good docs about this.