fastplyr 0.3.0

• tidy_quantiles gains dramatic speed and efficiency improvements.

• The order and sort arguments for data frame functions have been
  superseded in favour of .order and .sort.

• New argument .order added to both f_summarise and tidy_quantiles
  to allow for controlling the order of groups.

• rowwise_df is now explicitly unsupported. To group by row, use f_rowwise.

• New functions f_nest_by, f_rowwise and add_consecutive_id.