Refactored a lot of code. Added a preliminary text window

Put configuration options for window so that the rendering is controlled
on initialization of window.

Improved clip function to only clip before the borders.

Added a border radius class for initializing separate border radii for
each corner.

test.py

@@ -8,7 +8,7 @@ import sys
 from direct.showbase.ShowBase import ShowBase
 from pandac.PandaModules import *
 
-from jgui.surface.surface import *
+from testclasses import *
 
 class Test(ShowBase):
     def __init__(self, width=1024, height=1024):