circular interpolation

[sameer]

This resolves #12

Remaining work:

• [x] Fix bug in implementation of bezier -> circular arc paper where too many arcs are used, to the point which a linear move is also within tolerance
• [ ] Gain a better understanding of the math behind CSS transforms + ellipses
• [x] Do true circular interpolation on ellipses (done but not the best approach)

[codecov[bot]]

Codecov Report

Merging #17 (505a07b) into master (ad50a04) will increase coverage by 11.90%. The diff coverage is 90.14%.

@@             Coverage Diff             @@
##           master      #17       +/-   ##
===========================================
+ Coverage   40.03%   51.93%   +11.90%     
===========================================
  Files           5        6        +1     
  Lines        2463     2944      +481     
===========================================
+ Hits          986     1529      +543     
+ Misses       1477     1415       -62     

Impacted Files	Coverage Δ
lib/src/postprocess.rs	88.05% <ø> (ø)
lib/src/converter.rs	86.36% <77.77%> (+12.33%)	:arrow_up:
lib/src/turtle.rs	82.25% <82.73%> (+27.96%)	:arrow_up:
lib/src/lib.rs	29.71% <92.30%> (+0.67%)	:arrow_up:
lib/src/arc.rs	93.58% <92.81%> (ø)
lib/src/machine.rs	76.05% <100.00%> (+20.98%)	:arrow_up:

---

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 ad50a04...505a07b. Read the comment docs.