Fix typo in augmented assignments transform. Function dictionary out from transformer definition to enable second kind of transform. negative rather than abs used in signed_* functions. Primitives is_positive and negative use operator module functions (all operators in transformed scripts will apply on positive values).
Fix typo in augmented assignments transform. Function dictionary out from transformer definition to enable second kind of transform. negative rather than abs used in signed_* functions. Primitives is_positive and negative use operator module functions (all operators in transformed scripts will apply on positive values).

GillesArcas/numsed,GillesArcas/cws