Add support for cached flywire connectome dumps

[codecov[bot]]

Codecov Report

Merging #170 (7ea8dd7) into master (ae195cc) will increase coverage by 1.34%. The diff coverage is 81.27%.

@@            Coverage Diff             @@
##           master     #170      +/-   ##
==========================================
+ Coverage   51.54%   52.88%   +1.34%     
==========================================
  Files          34       36       +2     
  Lines        4150     4347     +197     
==========================================
+ Hits         2139     2299     +160     
- Misses       2011     2048      +37     

Impacted Files	Coverage Δ
R/fafbseg-py.R	67.24% <ø> (ø)
R/ng-scene.R	86.48% <ø> (ø)
R/flywire-urls.R	65.34% <50.00%> (ø)
R/flytable.R	64.38% <60.00%> (+0.02%)	:arrow_up:
R/utils.R	51.67% <63.63%> (+0.26%)	:arrow_up:
R/flywire-arrow.R	81.48% <81.48%> (ø)
R/flywire-api.R	80.13% <83.82%> (+0.18%)	:arrow_up:
R/vcache.R	94.11% <94.11%> (ø)
R/autosyn.R	46.29% <100.00%> (+0.20%)	:arrow_up:

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