Added sp_*() family of functions for reading from / writing to Sharepoint.
Fixed tntp_colors() to return supplied names if given
Added choose_text_color() function.
Added position_diverge() function.
Adjusted title and legend positioning in tntp_style() to align to the left edge of the image rather than the left edge of the coordinate plane
Added yb_* and top2b_* palettes to tntp_palette() functions