v1.1.0.0

New:

• added a new Actor class which makes it easier to manage how Render transforms actors at render time. Actor also create's labels and can be printed to get more details about a specific mehs
• exposed scale for screenshots (thanks @vigji )

Bug fixes:

• multiple calls to render now transform neurons correctly
• scene.add_brain_regions now returns colored brain regions when only an hemisphere's mesh is requested