v0.2

This release has breaking changes involving some GeoJSON edge cases.

1. Foreign Members in Feature Collections

   Extra attributes in a feature collection object will now be put into featureCollection.ExtraMembers. Similarly, stuff in `ExtraMembers will be marshalled into the feature collection base. The break happens if you were decoding these foreign members using something like

   type MyFeatureCollection struct {
       geojson.FeatureCollection
       Title string `json:"title"`
   }

   The above will no longer work in this release and it never supported marshalling. See #56 for more details.

2. Features with nil/missing geometry will no longer return an errors

   Previously missing or invalid geometry in a feature collection would return a ErrInvalidGeometry error. However missing geometry is compliant with section 3.2 of the spec. See #38 and #58 for more details.

This release also includes faster unmarshalling for Mapbox Vector Tiles (MVT) see #57

9 commits v0.1.7...v0.2