CRAN Version 0.1.3

Major changes:

• osmdata_pbf function removed as the overpass server no longer provides the experimental API for pbf-format data.
• Remove deprecated add_feature() function; entirely replaced by add_osm_feature().
• get_bb() with polygon output formats now returns ALL polygon and multipolygon objects by default (issue#195)

Minor changes:

• New Contributors: Andrea Gilardi (@agila5)
• Bug fix for issue#205