New model specification

[hcho3]

Implement #228

Closes #133
Closes #228

[codecov-io]

Codecov Report

Merging #229 (f1a513a) into mainline (910d6f7) will increase coverage by 0.12%.
The diff coverage is 91.57%.

@@              Coverage Diff               @@
##             mainline     #229      +/-   ##
==============================================
+ Coverage       83.40%   83.52%   +0.12%     
  Complexity         44       44              
==============================================
  Files              93       93              
  Lines            6814     6873      +59     
  Branches           42       42              
==============================================
+ Hits             5683     5741      +58     
- Misses           1107     1108       +1     
  Partials           24       24              

Impacted Files	Coverage Δ	Complexity Δ
include/treelite/tree.h	93.02% <ø> (ø)	0.00 <0.00> (ø)
src/compiler/ast/builder.h	100.00% <ø> (ø)	0.00 <0.00> (ø)
src/compiler/failsafe.cc	89.00% <40.00%> (-0.80%)	0.00 <0.00> (ø)
include/treelite/tree_impl.h	89.67% <85.71%> (-0.22%)	0.00 <0.00> (ø)
src/compiler/ast_native.cc	91.40% <91.42%> (-0.29%)	0.00 <0.00> (ø)
src/compiler/ast/build.cc	96.49% <100.00%> (ø)	0.00 <0.00> (ø)
src/frontend/builder.cc	77.99% <100.00%> (+1.37%)	0.00 <0.00> (ø)
src/frontend/lightgbm.cc	84.57% <100.00%> (+0.55%)	0.00 <0.00> (ø)
src/frontend/xgboost.cc	79.70% <100.00%> (+0.94%)	0.00 <0.00> (ø)
src/frontend/xgboost_json.cc	76.00% <100.00%> (+0.79%)	0.00 <0.00> (ø)
... and 1 more

---

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 910d6f7...d5e4f3e. Read the comment docs.