Create transform collections.
Finish off transforms utilities, add tests.
Add ability to separate out eval_points in transforms.
Correct Connection logic in EnsembleVertex.

 - Added new DummyConnection object for Probe edges to play nicely
   with new Transform logic
   - Modified Builder appropriately
Replaced transforms utilities with Connection utilities.

 - Updated in Ensemble
 - Corrections to DummyConnection to account for Nengo functionality
Check for the presence of compatible connections.
Track Nengo upstream.
Track Nengo upstream.

(cherry picked from commit 2593f8a1df0621c2061da4d1c913b552a4a1ea72)
Correction and simplifications to connections logic.
Modify ethernet to use new Connection logic.
Bugfix: Apply function to output.
Add generic filter filtering capabilities.
Consolidate filter logic.
Merge branch 'master' into transforms
Minor fixes to ethernet io.
Modify SpiNNlink IO for minor API change in simulator.
Merge branch 'transforms' into f-of-t-nodes

Conflicts:
	nengo_spinnaker/simulator.py
Changes as a result of merging in `transforms`.
Use the new Connections utility to correct f-of-t nodes.