Implemented grid-device server.

...ruffle/r/library/fastrGrid/server/RemoteDeviceServer.java

...c/com/oracle/truffle/r/library/fastrGrid/GridContext.java

.../com/oracle/truffle/r/library/fastrGrid/WindowDevice.java

...ry/fastrGrid/device/NotSupportedImageFormatException.java

...e/r/library/fastrGrid/device/awt/BufferedImageDevice.java

...uffle/r/library/fastrGrid/device/remote/RemoteDevice.java

...ary/fastrGrid/device/remote/RemoteDeviceDataExchange.java

...fle/r/library/fastrGrid/grDevices/InitWindowedDevice.java

...runtime/src/com/oracle/truffle/r/runtime/FastRConfig.java

mx.fastr/mx_fastr.py

mx.fastr/native-image.properties

mx.fastr/suite.py