v0.2.2

• crs structure matches new sf definition issue49
• sf_to_df() adds sfc_columns attributes to identify which of the columns form the coordinates issue50
• XYM dimensions correctly handled
• unlist argument in sf_to_df() to specify columns you want to unlist when converted to data.frame
• helper functions with easier syntax - thanks to @mdsumner
• list_columns argument in sf_ functions to specify which columns should be filled with all the values in a list

v 0.2.1

• sf_remove_holes() removes holes from polygons
• calculate_bbox() function for (re) calculating the bounding box of an sfc object
• sf_cast() functions for casting between geometry types
• optimised converting sfc_POINT-only objects to data.frames
• sf_to_df() adds sfc_columns attributes to identify which of the columns form the coordinates

v 0.1

• keep = TRUE argument to keep other data columns when converting to sf
• sf_to_df functions for converting sf objects to data.frames
• fill = TRUE argument to fill the data.frame columns with data