Graph label experimenting, API changes, incl broader text font support

+ Misc:

fix error saying no py27 binaries for mac when really should say 26

rename coordinate_space() to custom_space()

allow draw geojson

change draw_square to draw_box

maybe remove dist_coord funcs

make a font file searcher for each os

add possibility to specify custom font path

make extensive font name lists to choose from by reading font names with
fontTools