Transformation Convenience: Horizontal and Vertical Shift Methods

[Scienfitz]

• Vertical shifts by an amount x can be applied by appending an AffineTransformation(shift=x)
• Horizontal shifts by an amount x can be applied by prepending an AffineTransformation(shift=-x)

Convenience methods like .hshift and .vshift would be nice to have and would avoid bugs like #638 due to increased simplicity.