Teach NrrdMinMax to ignore warning messages (eg when NA vals present)
Merge branch 'master' of github.com:jefferis/AnalysisSuite

* 'master' of github.com:jefferis/AnalysisSuite:
  teach plot3d.neuronlist to evaluate col argument in context of attached df
  Change startup code in readme to match installer
  Commit left over code that will signal bad root in ParseSWC
  Fix neuron handling of suffix in write.neuron when taking file name from neuron
  New transform.neuron function
  tidier way of source-ing startup code