Added the "names" and "zones" keyword arguments to the .get_budget() method to allow user to retrieve subsets of the budget arrays. Updated and streamlined the .to_csv() method.
Added the "names" and "zones" keyword arguments to the .get_budget() method to allow user to retrieve subsets of the budget arrays. Updated and streamlined the .to_csv() method.

bdestombe/flopy-1,aleaf/flopy,jentjr/flopy,brclark-usgs/flopy,aleaf/flopy,brclark-usgs/flopy,jentjr/flopy