FastR Grid: devices support width/height parameters

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

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

...oracle/truffle/r/library/fastrGrid/device/GridDevice.java

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

.../r/library/fastrGrid/device/awt/BufferedJFrameDevice.java

...ffle/r/library/fastrGrid/device/awt/Graphics2DDevice.java

.../truffle/r/library/fastrGrid/device/awt/JFrameDevice.java

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

...ruffle/r/library/fastrGrid/grDevices/R/fastrGridDevices.R