Update WebCL API and add data type support
Merge branch 'tangcheng-x-develop' into develop
Added recent contributors
Fix in URI::hasSameOrigin: data URIs have always the same origin

Required to make <img> with data URIs work in Firefox
Bugfix: Attributes are case-insensitive in HTML

Fixes #82
Added test that fails before fix
Started modularization of renderer
Moved GLContext to new module
Improved texture handling

Reduced state changes
Moved RenderTarget into module
Moved getXflowEntryWebGlData and getGLBufferFromXflowDataEntry into module

getXflowEntryWebGlData only exposed via GLContext now
Moved ProgramFactory to modules
Moved SystemNotifications to module
Moved scene to renderer module
Moved DataChangeListener, Frustum, Mesh, GLScene, Renderer and RendererFactory to renderer module
Moved all adapters to renderer-module
Moved shaders to renderer-module (as materials)
Moved drawableclosure and meshclosure to renderer-module
Removed some global dependencies from MeshClosure
Moved renderinterface to renderer-module
Moved render-passes, render-trees and objectsorter to renderer module