Added flextest

flextest.py

@@ -0,0 +1,29 @@
+#!/usr/bin/python
+from boxes import *
+
+class FlexTest(Boxes):
+
+
+    def render(self, x, y):
+        self.moveTo(5, 5)
+        self.edge(10)
+        self.flex(x, y)
+        self.edge(10)
+        self.corner(90)
+        self.edge(y)
+        self.corner(90)
+        self.edge(x+20)
+        self.corner(90)
+        self.edge(y)
+        self.corner(90)
+
+        self.ctx.stroke()
+        self.surface.flush()
+
+x = 40
+y = 100
+f = FlexTest(x+30, y+10, thickness=5.0, burn=0.05)
+# (1.5, 3.0, 15.0) # line distance, connects, width
+f.flexSettings = (2, 4.0, 16.0)
+f.render(x, y)
+