Issue#135 interactive programs

[luchotc]

Resolves #135

[afska]

Should we call this only if editor.interactiveMode?

[luchotc]

I could add an if here. It doesn't affect the current layout, as it is just toggling .play-mode that doesn't change anything without .mu-kids-interactive

[flbulgarelli]

Have you checked only public API selectors are used?

[afska]

I don't like the fact that editor.html is getting huge as we add new features. I'd like to split it, but right now it's kind of complicated since we need to:

• update here https://github.com/mumuki/mumuki-gobstones-runner/blob/master/lib/assets_server.rb#L45
• update https://github.com/mumuki/mumuki-gobstones-runner/blob/master/lib/metadata_hook.rb#L23
• reimport the language in laboratory
• and I don't know if there are places like bibliotheca or classroom where we're importing the editor.html directly.

So maybe another solution could be compiling several files in one (like vulcanize does). I'll create another issue for that.

[flbulgarelli]

Looks good, just please import hammer directly from the other assets, so that no extra import on laboratory is required.