Replace GLU tesselated 3d fonts with own 3d font tesselator

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References:

• http://wiki.lwjgl.org/index.php?title=Using_GLU_Tesselator
• http://blog.nuclex-games.com/2007/08/xna-vector-font-renderer/
• https://www.google.co.uk/search?site=&source=hp&q=Nuclex.Fonts.Content.TrueTypeImporter&btnG=Search
• https://nuclexframework.codeplex.com/wikipage?title=Vector%20Fonts&referringTitle=Nuclex.Fonts
• http://nuclexframework.codeplex.com/discussions/333659

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Issue #26 was marked as a duplicate of this issue.

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removing FTGL from the project entirely, re #24 and #26

→ <<cset a39c0a7cf1f2>>

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Removing milestone: Beta (automated comment)