TDD iteration: add test and code for zero matrix creation by default constructor
Added tests and code for matrix size checking
Add tests and code for matrix elements access methods
Add tests for Matrix.getNorm() method
Implemented matrix comparison
Implemented matrix multiplication
Implemented checking is matrix lower or upper triangular
Implemented LU decomposition algorithm and tests
Implemented determinant calculation based on LU decomposition
Java style brackets
Correction of messages
Newline at end of file
Merge pull request #58 from surmin/determinant

Сурмин - Lab1 - Determinant