Fix recursive bug in totuple.  Not sure how it got there.
[Bugfix] SDPReceiveVertex reserved too little space for output keys.
Fixes to transmitted multidimensional values from ethernet.
Initial stab at decoded value recording.
Merge branch 'master' into decoded-rec
Example transmits sin rather than constant value.
Add decoded value example.
Default synapse value if not specified on probe.
Correct interleaving of probed decoded value data.
Remove debug io_printfs, "neaten" pointer arithmetic(?)
Corrections to SDP Receive Vertex, try to transmit output every timestep.
Neaten decoded value probe example.
Merge branch 'master' into decoded-rec
bitarray is an optional extra.

Without bitarray, utils.probes.SpikeProbe is None, this is caught by the
builder and an error is raised if the user tries to make use of this
functionality.
Merge branch 'master' into bitarray

Conflicts:
	nengo_spinnaker/builder.py
Merge pull request #45 from ctn-waterloo/bitarray

Make `bitarray` an optional extra
Merge remote-tracking branch 'origin/decoded-rec' into new-probes

Conflicts:
	nengo_spinnaker/builder.py
	nengo_spinnaker/utils/probes.py
Probe spikes.
Decoded output probing for Ensembles.
Correction to default solver.