imports from libregamewiki, conversions cvs to git, correcting keywords and code dependencies

entries/t3.md

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+# T^3
+
+_Blockout clone._
+
+- Home: http://t-3.sourceforge.net/, https://sourceforge.net/projects/t-3/
+- State: beta, inactive since 2005
+- Download: https://sourceforge.net/projects/t-3/files/
+- Platform: Windows, Linux
+- Keywords: puzzle, 3D, tetris-like
+- Code repository: http://t-3.cvs.sourceforge.net (cvs)
+- Code language: C++
+- Code license: GPL-2.0
+
+Developer: Derek Hausauer
+
+## Building