Quaternion from 2 vectors

[korken89]

Implements a simple way to get a quaternion representing the rotation between 2 vectors.

[codecov-commenter]

Codecov Report

Merging #94 (c96f4a5) into main (2458446) will decrease coverage by 2.80%.
The diff coverage is 0.00%.

❗ Current head c96f4a5 differs from pull request most recent head 792ef7d. Consider uploading reports for the commit 792ef7d to get more accurate results

@@            Coverage Diff             @@
##             main      #94      +/-   ##
==========================================
- Coverage   57.42%   54.61%   -2.81%     
==========================================
  Files          38       38              
  Lines         876      921      +45     
==========================================
  Hits          503      503              
- Misses        373      418      +45     

Impacted Files	Coverage Δ
src/quaternion.rs	0.00% <0.00%> (ø)

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[tarcieri]

Thank you!