Koen de Boer

Results 2 issues of Koen de Boer

**What's new** - Added `gso_givens.h` and `gso_givens.cpp`. - Added `test_lll_givens.cpp` in the tests folder. The givens GSO class should be compatible with LLL, but not (yet) with Wrapper. I didn't...

- We should have some standard performance tests. @malb suggested > Maybe some LLL and some BKZ-60 on some double and some mpfr matrices? - Also, because of possible future...