Changes in version 0.3.0                        

  - New triangle_surface_area() function for calculating triangle areas
    in 2D or 3D. Accepts a matrix with 2 or 3 columns; for 2D input, z
    coordinates default to zero. This provides a general interface for
    triangle area calculations without the signed area semantics of
    triangle_area().

                 Changes in version 0.2.0 (2023-12-21)                  

  - Improved C++ sum method to match benchmarks (from 2023 advent of
    code Day 18, see https://github.com/hypertidy/area/issues/4). Thanks
    to Tan Ho, Jonathan Carroll, and Rich FitzJohn.

                 Changes in version 0.1.0 (2023-04-04)                  

  - Now use cpp11.

  - Added C++ versions of triangle and polygon area.

  - Begin conversion to C++ headers capability.

                        Changes in version 0.0.1                        

  - First working version using R code only.