exectiming-2.0.1

• change how the output from .statistics() looks and add information on the min and max times.
• add copiers to .time_it() and .decorate(), which are functions that will copy any arguments for each iteration in case the function has side-effects and modifies the parameter
• add multiple to .plot() to allow multiple splits to be graphed on the same plot by making more than one call to .plot() and including multiple=True in all but the last call
• add setup to .time_it() which is a string the will be executed once at the top if block is a string. Can be used to introduce needed names into the namespace
• add checks to ensure that only integer/float values are the independent variables for .best_fit_curve() and .plot() to avoid errors that are difficult to decipher