Accept an array as valuePath

[buschtoens]

Fixes #456.

[buschtoens]

Compared to the rest of light-table the performance hit introduced by using {{collect}} isn't extreme. Looking at the render performance view in the Ember Dev Tools, I see no noticeable increase in render time for the demo page.

Still, I would like to have some proper metrics first.

[danilovaz]

Hi @buschtoens ! Anything with this PR? There is something I can help? The addon is amazing and this feature will help a lot

[buschtoens]

@danilovaz glad you're loving it ♥️

I'm hesitant to merge, this adds another dependency and slight performance hit for many users, even though they might never use the feature.

However, we got you covered. 😉
https://github.com/buschtoens/ember-light-table-cell-type-multi-value

But please be aware of the issues.