Added Screen Rotation manipulation API (with X11 impl)

Added screen rotation change capability with impl for X11 (using Xrandr)

com.jogamp.newt.Screen: added 2 methods which cover screen roation lifecycle

setScreenRotation(int rot): Change the Screen Rotation to
one of the rotations defined in ScreenMode, namely:
ROTATE_0, ROTATE_90, ROTATE_180, ROTATE_270

int getCurrentScreenRotation(): Get the Current screen rotation
returns -1 if not implemented natively.

+++++++++++++++++++++++++
Notes:
1- At init the original rotation is called natively and cached,
when screen is destroyed the rotation is reverted.

2- On X11 with Nvidia: you need to edit /etc/X11/xorg.conf:
Add the following line:
Option         "RandRRotation" "on"
in  Section "Device" after BoardName.

+++++++++++++++
Added TestScreenMode02NEWT which includes 4 tests
1- Rotate 90
2- Rotate 180
3- Rotate 270
4- Rotate with screen mode change
should fail if screen rotation not implemented natively.
(4) withh fail if screen mode not impl natively as well.

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