Fix/spine rename

[jefferis]

incorporates #144 with a few extra changes + merge in master

[codecov]

Codecov Report

Merging #146 (0dae3fb) into master (51ac148) will increase coverage by 0.04%.
The diff coverage is 73.33%.

@@            Coverage Diff             @@
##           master     #146      +/-   ##
==========================================
+ Coverage   47.66%   47.70%   +0.04%     
==========================================
  Files          29       29              
  Lines        3529     3536       +7     
==========================================
+ Hits         1682     1687       +5     
- Misses       1847     1849       +2     

Impacted Files	Coverage Δ
R/flywire-api.R	77.48% <50.00%> (-0.56%)	⬇️
R/autosyn.R	40.03% <100.00%> (ø)
R/choose-segmentation.R	90.32% <100.00%> (ø)
R/flywire-coord.R	77.41% <100.00%> (+1.55%)	⬆️
R/flywire-urls.R	62.50% <100.00%> (+1.38%)	⬆️

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