Changes

Fix Bug 723: Remove VK_KP_<Cursor> numpad key-codes, use general VK_<Cursor> key-codes; Respect numpad printable keys; Use keySym for numpad if possible.

- KeyEvent keyCode/keySym values re-ordered!

- Remove VK_KP_<Cursor> numpad key-codes, use general VK_<Cursor> key-codes.
  Numpad cursor keys are not supported on some platforms (Windows),
  or not configured on most X11 configurations.

- Respect numpad printable keys,
  i.e. don't treat them as non-printable.

- Use keySym for numpad if possible.
  Numpad keys require modifiers, hence X11 and Windows shall return keySym.

NEWT: MouseEvent Ctor: Use proper float[] rotationXYZ and float rotationScale arguments.

Fix Bug 737: Add shader default precision for GLSL [1.30 .. 1.50[ - See GLSL Spec [1.30 - 1.40].

Fix Bug 711: Align Graphs's Curve Shader programmatically to used GL/GLSL version, following all other internal GLSL usage utilizing ShaderCode.

GLSL version determination: Use static GLSL version mapping in case of GLES - Mesa 9.1* fails otherwise since it supports ES3/300 which is returned.

JOGL GLSL ShaderProgram/State: Release of an unlinked ShaderProgram shall not throw an exception -> avoid calling useProgram(.., false).

GLPixelBuffer.dispose(): Set diposed:=true to allow isValid() to work properly; GLJPanel: Rely on GLPixelBuffer.requiresNewBuffer(..) for each frame, don't use local pixelBufferCheckSize (buggy w/ singleton)

Fix Bug 736: Add GL.GL_UNSIGNED_INT and GL2ES2.GL_INT case in GLArrayDataWrapper.getBufferClass()

Fix Unit Tests Exclusion " if( !GLProfile.isAvailable(GLProfile.GL*) ) { .. } ": Add missing return statement to abort test.

Unit Test: Remove unused import

Fix regression of commit b2802021acf8aa9b363ebef383c8dc8c8079ffa4 (Bug 711): varying in/out mapping is different in vertex/fragment shader!

Vertex shader:   varying -> out
Fragemnt shader: varying -> in

NV GLSL compiler ignored in/out direction,
where ATI GLSL compiler failed (could not find gcu_Weight, due to dead code).