v1.0.0

Changes since v0.9.4 are mainly to some of the display code:

• imshow and animshow now correctly handle RGB(A) images
• there's a breaking change in how imshow and animshow want multiple images / videos. They can no longer be arrays with an extra dimension (e.g., 3d array of multiple grayscale images); they must be lists of those arrays. This allows us to avoid some annoying ambiguity.
• animshow correctly handles complex arrays.
• adds more tests for imshow and animshow