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 projection option to ol.source.IGC
Add projection to igc example
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