Utilities for creating host-simulated network fragments.
Remove orphaned Nodes from the host network.
Merge in functionality from transforms branch.
Revert "Merge in functionality from transforms branch."

This reverts commit 600df6755b9ca0071455e5850834532f97c487b1.
Use the reference Nengo simulator for Nodes.
Update nodes.py

Unclosed parenthesis in docstring :@
Initial stab at probing Nodes, PassNodes.
Ignore Synapses on PassNode probes where the inputs to the PassNode have synapses.

- `utils.probes.get_corrected_probes` provides warnings and modifies
  probes.
Merge branch 'master' into probe_nodes

Conflicts:
	nengo_spinnaker/value_sink_vertex.py
Correct merge.
Merge pull request #54 from ctn-waterloo/simulator

Simulator improvements
Merge pull request #58 from ctn-waterloo/probe_nodes

Initial stab at probing Nodes, PassNodes.
Add oscillator example.
Some merge corrections.
Fix for Node on host simulation.

- Remove (and test that) Ensemble related connections are not passed to
  the host simulator.
- Don't bother running the host simulator if it has nothing to simulate.
Update setup.
Correct version number.
First pass on Python-side of PES
Again, very much a first pass of C-side
Few compiler fixed, all that remains is input filtering