Updated another plane bug and setup version.

Author: AlexMarinescu

gem/plane.py

@@ -3,11 +3,11 @@
 
 def flip(plane):
     ''' Flips the plane.'''
-    fA = -plane.a
-    fB = -plane.b
-    fC = -plane.c
-    fD = -plane.D
-    fNormal = -plane.normal
+    fA = -plane[0]
+    fB = -plane[1]
+    fC = -plane[2]
+    fD = -plane[3]
+    fNormal = -plane[4]
     return [fA, fB, fC, fD, fNormal]
 
 def normalize(pdata):

setup.py

@@ -3,7 +3,7 @@
 setup(
   name = 'gem',
   packages =['gem'],
-  version = 'v0.1.8',
+  version = 'v0.1.10',
   description = 'Math library for game programming in python. ',
   author = 'Alex Marinescu',
   author_email = 'ale632007@gmail.com',