feat(matrix_op): add multiplication

matrix_ops: add matrix multiply capability
chore(fmt): flatten crate directory
tests(ops): add tests for multiplication

src/lib.rs

@@ -9,20 +9,23 @@
 //!
 //! Examples:
 //! ```
-//! ...
 //! use matrix::Matrix;
-//! let m = Matrix::from_str("1,2,3\n4,5,6\n7,8,9");
+//! 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);
 //! println!("Evaluate determinant of matrix: {}", m.determinant());
 //! println!("Transpose of matrix m:\n{}", m.transpose());
-//! ...
+//! 
 //! ```
 
-pub mod types;
+mod matrix;
+pub mod error;
 
 #[cfg(test)]
 mod tests;
 
+pub use matrix::Matrix;
+
 pub fn test() {
     println!("Testing code here");
 }