Implement sort.multiPhylo()

[ms609]

No description provided.

[codecov]

Codecov Report

Merging #85 (7d3cbc6) into master (d1559e1) will decrease coverage by 0.04%.
The diff coverage is 93.45%.

❗ Current head 7d3cbc6 differs from pull request most recent head 41d80bd. Consider uploading reports for the commit 41d80bd to get more accurate results

@@            Coverage Diff             @@
##           master      #85      +/-   ##
==========================================
- Coverage   96.86%   96.81%   -0.05%     
==========================================
  Files          45       46       +1     
  Lines        3474     3578     +104     
==========================================
+ Hits         3365     3464      +99     
- Misses        109      114       +5     

Impacted Files	Coverage Δ
src/TreeTools-init.c	100.00% <ø> (ø)
R/sort.R	86.36% <86.36%> (ø)
src/int_to_tree.cpp	97.38% <93.10%> (-2.62%)	⬇️
R/TreeNumber.R	98.91% <100.00%> (+0.30%)	⬆️
R/tree_numbering.R	100.00% <100.00%> (+1.45%)	⬆️
src/keep_tip.cpp	100.00% <0.00%> (ø)

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