Ensure MultiPolygons are rendered if only one of fill and stroke are set
Merge pull request #1652 from twpayne/fix-stroke-only-multipolygon

Ensure MultiPolygons are rendered if only one of fill and stroke are set
Merge pull request #1651 from twpayne/fix-rbush-remove

Fix ol.structs.RBush#remove
Passing options to the select interaction is mandatory
Merge pull request #1653 from elemoine/select-options

Passing options to the select interaction is mandatory
Make GeometryCollection dispatch `change` event'

When one of its component changes.
Merge pull request #1649 from tonio/geometrycollection_change

Make GeometryCollection propagate change events of its geometries.
Add projection option to ol.source.IGC
Add projection to igc example
Remove the map renderers option
Use the renderer map option in the examples
Merge pull request #1656 from twpayne/fix-igc-projection

Fix projection in IGC example
Merge pull request #1638 from elemoine/featureoverlay

Rename ol.render.FeaturesOverlay to ol.FeatureOverlay
Rename ol.render.IRender to ol.render.IVectorContext
Update examples to use vectorContext property in render events
Merge pull request #1657 from elemoine/renderer

Do not expose both renderer and renderers options
Merge pull request #1655 from twpayne/vector-context

Rename IRender to IVectorContext
Allow ol.Map renderer option to be a string
Use string instead of ol.RendererHint enum in examples
Don't export ol.RendererHint