Bounding box

[saundersresearch]

Description

I updated the camera to tighten the bounding box a bit and fixed some bugs with the camera.

Issue

• Closes Bounding boxes to get rid of blank space #31

Changes Made

• Added code to detect bounds based on provided NIFTI (from sliced NIFTI, tensor, ODF, glass brain, or automatically if none of these provided)
• Removed reset_camera_tight() as this led to problems with different orientations

Testing

• I have performed a self-review of my code.
• I have updated documentation and added docstrings as needed.