feat: matrix math

mul: impl Mul for LHS: i32, RHS: Matrix
trait: trait MatrixMath definition for cofactor, minors, adjoint,
determinant

src/lib.rs

@@ -9,7 +9,7 @@
 //!
 //! Examples:
 //! ```
-//! use matrix::Matrix;
+//! use matrix::{Matrix, MatrixMath};
 //! use std::str::FromStr;
 //! let m = Matrix::from_str("1,2,3\n4,5,6\n7,8,9").expect("Expected this to work");
 //! println!("Matrix string formatting:\n{}", m);
@@ -24,8 +24,11 @@ pub mod error;
 #[cfg(test)]
 mod tests;
 
-pub use matrix::Matrix;
+pub use matrix::{Matrix, MatrixMath};
 
 pub fn test() {
     println!("Testing code here");
+    let m = Matrix::from(vec![1,2,3,4,5]);
+    m.transpose();
+    m.determinant();
 }