Add tdraw.dll, tdraw.txt and LICENSE

Beta 85 Changes Summary.txt

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+Beta 85
+Summary of changes (For more details and notes, see the full changelog (TAT-v2.0-Beta-Changelog.txt) included in the release):
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+Fixed build menu bugs for Arm Gantry Constructor and Arm/Core Strategic/Tactical nuclear silos
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+Removed CTRL_G hotkeys from Arm and Core Construction Hovercraft.
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+Arm and Core Nexus can now only transport 2x2 footprint units (Was 3x3 units).
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+Arm and Core Advanced Construction Sub can now build the Amphibious Complex.