Bug fixes for ColoredInspector

Hey Chris,

I noticed a couple of things weren't working on master. I've heard you may be on a plane right now so apologies if you're already aware of these issues. :)

There were two issues I noticed:
1. `$self = $this` .. private method calls on `$self` weren't working.
2. Showing an empty array wasn't working.

The fix for issue 1 was to make the methods public-ish (private by convention). Not ideal.