A better architected Matrix library in c++.

Similar to https://github.com/liuxiaodong008008/MatrixLib.

Lightweight header-only matrix library (C++) for numerical optimization and machine learning. Ease of using is the emphasis of this library. Supported features are as following:

• lightweight
• dependency-free
• templated type
• copy-free matrix-view
• range-based matrix-view
• index-based matrix-view
• range-based for loop support iterator
• matrix builder
• flexiable matrix element access/selection
• variety of operators, including matrix-matrix operators and matrix-number operators
• broadcasting
• type casting