Fix numpy flat template for power

Implement powers for numpy

Add some testing requirements to environment

Fix typo in readme

Fix typo in readme

Updates to XGB, javascript

Support XGBRegressor

Add numpy_flat_kwargs language for functions with more than 255 arguments.

Attempted speed improvement

Merge branch 'master' into speed

Fix depth issue

WIP

Merge pull request #11 from modusdatascience/bagging

Add depth to printers

Bagging works, but only with numpy language