Add zenodo doi badge
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Merge pull request #126 from ajdm/zenodobadge

Change Zenodo badge to SVG version
Fix read.hxsurf to order vertices st surface normals always point outwards
Merge pull request #127 from ajdm/fix/surfacenormals

Fix read.hxsurf to order vertices such that surface normals always point outwards
Update nat citation with Zenodo DOI
Add basic implementation of pointsinside based on Rvcg

* Rvcg::vcgClost has a signed distance function but the result
  only seems to make sense for whole brain surfaces
* but not neuropil surfaces
* assume this has to do with how they are closed
Update to match up with fixed surface normals
Add test for pointsinside
minor doc fix - prune.dotprops has moved to nat
Merge branch 'feature/points-in-surf'

* feature/points-in-surf:
  minor doc fix - prune.dotprops has moved to nat
  Add test for pointsinside
  Update to match up with fixed surface normals
  Add basic implementation of pointsinside based on Rvcg
Verbatim version of nat.as::InterpolateAlongNeuron
basic implementation of resample.neuron

* dependent functions
Always recalculate seglengths
Add test for resample.neuron
Add two more tests that reveal bugs in resample.neuron
Fix bug in resample.neuron
Consistent return values for as.seglist.neuron

* always returns list of lists when all=TRUE
  even when there is only one subtree
update resample docs inc FIXME resample.neuron

* resample.neuron doesn’t handle width or multiple subtrees
give seglengths a flatten option (true by default)

* i.e. can return list of seglengths vectors for each
  subtree