Merge pull request #205 from a-canela/pyopengl-flexible-version

Made PyOpenGL version flexible at setup.py to avoid OSMesa rendering issues

Author: mmatl

setup.py

@@ -21,8 +21,8 @@ def get_imageio_dep():
     'numpy',                      # Numpy
     'Pillow',                     # For Trimesh texture conversions
     'pyglet>=1.4.10',             # For the pyglet viewer
-    'PyOpenGL==3.1.0',            # For OpenGL
-#    'PyOpenGL_accelerate==3.1.0', # For OpenGL
+    'PyOpenGL~=3.1.0',            # For OpenGL
+#    'PyOpenGL_accelerate~=3.1.0', # For OpenGL
     'scipy',                      # Because of trimesh missing dep
     'six',                        # For Python 2/3 interop
     'trimesh',                    # For meshes