Benchmark matrix addition
Add the matrix_add2.cpp to CMakeList.txt
git add matrix_add2.cpp
Refactor matrix_mul_1.cpp to use new API
Add linbox and LELA benchmarks
Add new benchmarks
Add new matrix multiplication benchmarks
Remove whitespaces
Merge pull request #190 from thilinarmtb/matrix_benchmarks_new

New Matrix benchmarks after merging #186