Add very basic webgl vector renderer
Get renderer from query string in vector point examples
Use triangles to draw points with WebGL
Remove snap code from synthetic-points example
Use texture to draw points with WebGL
Update wmtssource.js

- "duplicated" style parameter is not supported by Intergraph GeoMedia
- Uppercase Parameter is needed by ARCGis 
- are there other constraints?
Add support for icon sprites
Add Hashable interface
Add an icon sprite webgl example
Move font-family customization to layout.css
Merge pull request #10 from elemoine/icon-sprite

[webgl-point] Make WebGL image replay support icon sprites
Flatten the WebGL replay class hierarchy
Better typing, fewer arrays
Clearer comment
Merge pull request #11 from elemoine/webgl-point-refactor

Clean up WebGL replay code
Implement hashCode for ol.style.Circle
Make shaders closer to WebGL image replay
Delete ImageReplay textures
Fix drawElement call
Merge pull request #12 from elemoine/webgl-point-refactor

[webgl-point] Refactoring and fixes