add OpenStreetMap to the terrain options in the 'shortcode builder'
add OpenStreetMap to the terrain options in the 'shortcode builder'

wangjun/TimelineJS-Wordpress-Plugin,wangjun/TimelineJS-Wordpress-Plugin,NUKnightLab/TimelineJS-Wordpress-Plugin,NUKnightLab/TimelineJS-Wordpress-Plugin,NUKnightLab/TimelineJS-Wordpress-Plugin,NUKnightLab/TimelineJS-Wordpress-Plugin,wangjun/TimelineJS-Wordpress-Plugin