Replace unit tests using SCALING_FACTOR.
Replace unit tests using SCALING_FACTOR.

Removed test which tested the behavior of SCALING_FACTOR and added tests which test whether the appropriate warnings are raised when SCALING_FACTOR is set to a value different from 1.
greginvm/pyclipper,anthrotype/pyclipper,anthrotype/pyclipper,greginvm/pyclipper,anthrotype/pyclipper,greginvm/pyclipper