Math::Combination_out - 0.01 - first version - Prints combinations without repetitions

Math::Combination_out - 0.02 
- Added option to prints combinations with repetition
- Moved to GPLv3 license
- Some small improvements

Math::Combination_out - 0.03
- The results are exported

Math::Combination_out - 0.04, 0.05, 0.06, 0.07
- Code optimization

Math::Combination_out - 0.08
- Two subroutines are exported
- Code optimization
