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 :@
Fix to ValueSinkVertex region size calculation.
Build decoders once and transform as necessary.
Compress decoders, get valid dimensions.

Construct decoders where all zero columns have been removed.
Perform this action on groups of decoders and tuples representing the
"header", index and dimension of each remaining dimension in the block.
"Headers" are for the purpose of attaching KeySpace generators or
similar.
EnsembleVertex uses new decoder tools.
Modified release number.
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.
Correct test.
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.
Merge branch 'master' into decoders

Conflicts:
	nengo_spinnaker/utils/__init__.py
Some merge corrections.