Add ol.easing.linear
Add zoom from animation
Add animation duration to ol.View2D.zoom
Add animated zoom to zoom control
Add animated zoom to keyboard zoom interaction
Trim search string before use

The `window.location.search` string includes the "?" symbol.  Without this change, `createFromQueryData` only works if the "renderer" parameter is not in first position (see 4037bafc453a8bde0c6a6508e5f4f385702436c1).
Properly set transform before filling background (closes #128)

Order of args is m11, m12, m21, m22, dx, dy
Standardizing color ranges (see #129)
Errant require
Merge pull request #129 from tschaub/color

Going with CSS norms for r/g/b/a values.
Export animation functions, thanks @elemoine
Clear canvas with opacity 1
Export ol.tilegrid.TileGridOptions
Export ol.tilegrid.XYZOptions
Fix Stamen exports
Export ol.RendererHints.createFromQueryData
Export ol.View2D
Merge pull request #131 from twpayne/add-missing-exports

Add missing exports
Merge pull request #127 from twpayne/animated-zoom

Animated zoom