LDGLData merged into GLRenderer since it only deals with one document now. GLRenderer generalised from rendering documents to models.

Made a new renderer be created for each document, instead of reusing the same renderer for all documents.

Simplified GLRenderer::convert3dTo2d. The multiplication with the modelview matrix is not necessary, it's identity all the time... with that, I think the function makes much more sense now.

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mercurial