Rename render/featuresoverlay files to featureoverlay
Rename ol.render.FeaturesOverlay to ol.FeatureOverlay
goog.require in alphabetical order
Variable renaming in examples
Use featureOverlay in select interaction
Change olx.render.FeaturesOverlayOptions to olx.FeatureOverlayOptions
Fix minor typo in vector-layer example
Add failing test for change event propagation
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