Static outputs and update

Trying to implement static outputs.

• Static outputs can't be pushed multiple times
• Static outputs can be pushed with time None
• Static outputs can be pulled with arbitrary time
• Static outputs can be pulled time None
• Static outputs are not considered a dependency by the scheduler
• Implemented the static update stuff for compositions without time components
• Add a static noise generator for testing purposes

"Static update" works now as long as the source components are not pull-based, or target components are not push-based.

Things to note

• We currently get data without a time axis when on a static link without time from downstream
  • Fixed in !167 (merged)

Fixes #32 (closed)