mapboxer 0.2.0

Added custom controls:
- add_text_control: Add text boxes to the map
- add_mouse_position_control Show coordinates on mouseover
- add_filter_control: Filter layer data on the fly

mapboxer 0.1.2

Added layer shortcuts beside the generic add_layer func:
- add_fill_layer
- add_circle_layer
- add_line_Layer

mapboxer 0.1.1

Added funcs to use raster tiles or a single background color as map style:
- use_raster_style
- use_stamen_raster_style
- get_osm_raster_tiles

mapboxer 0.1.0

Added a NEWS.md file to track changes to the package.