es2/RawGL2ES2demo: Remove AWT dependency to allow running on a Raspberry Pi; Make syntax BeanShell compatible.

- Raspberry Pi: Removed dependency of com.jogamp.newt.awt.NewtCanvasAWT
                to allow running on -Djava.awt.headlessi=true systems,
                we can do this by using NEWT directly to open a window.

  You can run this demo on a Raspberry Pi
  using the JogAmp JOGL auto-build aggregate from 20 Aug 2012 and later:

  wget http://jogamp.org/deployment/archive/master/gluegen_577-joal_347-jogl_790-jocl_653/archive/jogamp-all-platforms.7z
  7z x jogamp-all-platforms.7z
  cd jogamp-all-platforms
  wget https://raw.github.com/xranby/jogl-demos/master/src/demos/es2/RawGL2ES2demo.java
  javac -cp jar/jogl-all.jar:jar/gluegen-rt.jar RawGL2ES2demo.java
  java -Dnativewindow.ws.name=jogamp.newt.driver.bcm.vc.iv -cp jar/jogl-all.jar:jar/gluegen-rt.jar:. RawGL2ES2demo

- Beanshell: removed final in function arguments
             and changed float array declaration
             to become BeanShell compatible.

  You can run this demo interpreted using Beanshell:

  wget http://www.beanshell.org/bsh-2.0b4.jar
  java -cp jar/jogl-all.jar:jar/gluegen-rt.jar:bsh-2.0b4.jar:. bsh.Interpreter RawGL2ES2demo.java

- Vertex and Fragment shaders: remove #version lines to make the shaders compile on more drivers.

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