Export ol.Sphere#circle function
Add Tissot indicatrix example
Don't use a named color for defaultFillStyle

Named color support is optional (see ol.color.ENABLE_NAMED_COLORS)
Use ol.color.ENABLE_NAMED_COLORS in tests
Merge pull request #1984 from fredj/export-circle

Export ol.Sphere.WGS84.circle function
Merge pull request #1985 from fredj/named-color

Handle ol.color.ENABLE_NAMED_COLORS = false
Rework handling of skipped features in replay
Add getSource getter in ol.source.ImageVector
Use ol.extent.getWidth and ol.extent.getHeight
Measure example: correct source link
Merge pull request #1996 from probins/measure

Measure example: correct source link
Make handling of skipped features faster
Merge pull request #1997 from elemoine/skipped-features-performance

Make handling of skipped features faster
Merge pull request #1994 from oterral/add_export

Add getSource function in ol.source.ImageVector
Merge pull request #1990 from elemoine/select-bug

Rework handling of skipped features in replay
Merge pull request #1995 from fredj/cleanup

Use ol.extent.getWidth and ol.extent.getHeight
Merge remote-tracking branch 'upstream/master' into dev_updateol