Refactor SCORPIUS code

[rcannood]

• Depend on dynutils for distance functions
• Merge reduce_dimensionality_landmarked and reduce_dimensionality functions
• Remove outlier_filter function

[codecov-io]

Codecov Report

Merging #8 into master will decrease coverage by 2.82%.
The diff coverage is 78.87%.

@@            Coverage Diff             @@
##           master       #8      +/-   ##
==========================================
- Coverage   69.02%   66.19%   -2.83%     
==========================================
  Files          13        9       -4     
  Lines         481      423      -58     
==========================================
- Hits          332      280      -52     
+ Misses        149      143       -6

Impacted Files	Coverage Δ
R/trajectory_inference.R	90.62% <ø> (ø)	⬆️
R/plotting.R	0% <ø> (ø)	⬆️
R/gene_importances.R	100% <ø> (ø)	⬆️
R/data.R	100% <ø> (ø)	⬆️
R/evaluation.R	79.48% <100%> (ø)	⬆️
R/extract_modules.R	84.61% <50%> (-5.13%)	⬇️
R/dimensionality_reduction.R	79.41% <79.41%> (+9.41%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4eb1e6b...b691963. Read the comment docs.