Add labels and lineage tools

[joshuahhh]

A few tools to make development easier:

• I added labels to every node I could find. It makes digging through the node graph way easier.
• When my desired label conflicted with a display label (like how TextComponent has the user-friendly but developer-unfriendly label Text), I added __devLabel instead.
• I added some "lineage" tools which help trace where a node is in the graph. Combined with all the new labels, these make life much more sane in Apparatus-node-graph-town.

PTAL @electronicwhisper.

🎄🎄🎄🎄🎄

[electronicwhisper]

This is fine.

We should make a coding style / conventions document. One that I am concerned about is what we take _property and __property conventions to mean. So far, I had used two underscores in particular to mean "don't serialize this property". I'm not sure if __devlabel is a correct usage in this case, since it's only happening on built in objects (which don't get serialized). But I am also open to creating different conventions.

[joshuahhh]

Yeah I actually meant __ to mean "don't serialize it", but that doesn't actually make any sense. I'll just change it to devLabel.