add an initial readme

README.txt

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+Jedi Academy with various changes to make it build/run on
+more platforms including amd64/x86_64.
+
+Currently only the single player code is built.
+
+The game needs to be patched to 1.01 to work, the data in the
+steam version is already patched.
+
+	How to build:
+
+mkdir build-sp && cd build-sp
+cmake ../code/
+make
+
+copy jasp and jagame*.so to your game data directory
+
+	Known issues:
+
+When running windowed the mouse does not work in the menus.
+
+Loading levels on amd64 seems to skip the cutscenes and
+not properly set everything up.
+
+Save games do not yet work on amd64.
+
+The demo has various issues and does not work properly.