v1.2.0 Cayley

The third release of the Chalkboard library, version 1.2.0. Main updates include:

• Matrices of any and all dimensions are now fully supported for any and all matrix commands, there is no four-by-four dimension limit anymore
• New matrix commands for calculating the trace of a matrix, the rank, the row space, the column space, the null space, the exponentiation, the reduced row echelon form (Gaussian elimination), solving a multidimensional system of linear equations, and converting a matrix into an object
• All .display commands (plotting commands for complex numbers, vectors, and matrices) have been moved to the plot category
• All .mulScl commands (scalar multiplication commands for vectors and matrices) have been renamed as .scl
• Minor bugfix regarding the vec2.magset and vec3.magset commands

Detailed changelog: v1.1.0...v1.2.0
Chalkboard website: https://zushah.github.io/Chalkboard/home.html