[orx-noise] Tidy up demos

Produce 720px wide images.
Use main() = application { for reduced indentation

orx-noise/src/jvmDemo/kotlin/DemoCubicNoise2D01.kt

@@ -1,21 +1,23 @@
 import org.openrndr.application
 import org.openrndr.color.ColorRGBa
-import org.openrndr.extra.noise.*
+import org.openrndr.extra.noise.cubicHermite3D
 
-fun main() {
-    application {
-        program {
-            extend {
-                drawer.points {
-                    for (y in 0 until height) {
-                        for (x in 0 until width) {
-                            val c = cubicHermite3D(100, (x + y) * 0.04, (x - y) * 0.04, seconds * 1.0) * 0.5 + 0.5
-                            fill = ColorRGBa(c, c, c, 1.0)
-                            point(x.toDouble(), y.toDouble())
-                        }
+fun main() = application {
+    configure {
+        width = 720
+        height = 360
+    }
+    program {
+        extend {
+            drawer.points {
+                for (y in 0 until height) {
+                    for (x in 0 until width) {
+                        val c = cubicHermite3D(100, (x + y) * 0.04, (x - y) * 0.04, seconds * 1.0) * 0.5 + 0.5
+                        fill = ColorRGBa(c, c, c, 1.0)
+                        point(x.toDouble(), y.toDouble())
                     }
                 }
             }
         }
     }
-}
+}