increasing estimators part 2

Max depth - 6, learning_rate - 0.1, max_features - log2

Estimators: 50
real    1m20.208s
user    1m19.112s
sys     0m1.3s

Estimators: 75
real    1m18.758s
user    1m17.748s
sys     0m1.236s

Estimators: 100
real    1m20.889s
user    1m19.732s
sys     0m1.400s

Estimators: 125
real    1m19.112s
user    1m18.032s
sys     0m1.304s

Estimators: 150
real    1m19.335s
user    1m18.172s
sys     0m1.452s

Estimators: 175
real    1m17.895s
user    1m16.960s
sys     0m1.296s

Estimators: 200
real    1m22.559s
user    1m21.196s
sys     0m1.580s