remove README.TXT from SDK project

sdk/README.TXT

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-What is the jMonkeyEngine SDK?
-------------------------------
-
-The jMonkeyEngine 3 SDK is a software development kit for Java 3-D game developers.
-It contains the jMonkeyEngine3 library and the jMonkeyPlatform, a game development environment.
-The jMonkeyEngine and the jMonkeyPlatform are platform-independent, open-source and free.
-
-This is an alpha release (May 2010). If you encounter any issues, please tell us!
-http://www.jmonkeyengine.com/wiki/doku.php/report_bugs
-We are looking forward to your feedback.
-
-
-Starting the jMonkeyPlatform
-----------------------------
-
-Windows:   Double-Click the "bin/jmonkeyplatform.exe" file
-
-Mac OS:    Double-Click the "jmonkeyplatform.app" Application
-
-Linux:     chmod u+x bin/jmonkeyplatform; ./bin/jmonkeyplatform &
-
-
-Running jMonkeyEngine Demos
----------------------------
-
-Choose File > New Project in the jMonkeyPlatform and create a "JME3 Tests" project. 
-Run the test project to see JME3 feature demos. 
-Browse the demo source code to learn from examples.
-
-
-Creating 3-D Games with the jMonkeyPlatform
--------------------------------------------
-
-Using the jMonkeyPlatform is the easiest method to develop jMonkeyEngine-based 3-D games. 
-Choose File > New Project and create a "Base Game" project to get started. 
-
-See the online Documentation for jMonkeyPlatform at
-http://www.jmonkeyengine.com/wiki/doku.php/jme3:jmonkeyplatform
-
-Get jMonkeyEngine 3 tutorials at
-http://www.jmonkeyengine.com/wiki/doku.php/jme3