fix(core.array) Make array.contains() return false if array is not passed.
refactor(data.functions) No need for "else" if returning inside "if".
refactor(*) Pulled domain label out of graph and into its own component.
- Removed all related hardcoded things from graph.js.
- Added missing tests
Merge pull request #79 from racker/refactor-domain-label

Refactor domain label.