Constants for preaproval states are available from AdaptivePayments class

Signed-off-by: Guillaume Poirier-Morency <guillaumepoiriermorency@gmail.com>
Correct naming for true and false constants

Signed-off-by: Guillaume Poirier-Morency <guillaumepoiriermorency@gmail.com>
Merge branch 'refs/heads/3.2/master' into 3.2/develop
Bad change for booleans.

Signed-off-by: Guillaume Poirier-Morency <guillaumepoiriermorency@gmail.com>
Added a method to validate numerics.
Add a method to format number.

Signed-off-by: Guillaume Poirier-Morency <guillaumepoiriermorency@gmail.com>
Refs #1164. Correction d'un bug dans le paypal frais format.

Signed-off-by: Quentin Avedissian <quentin.avedissian@gmail.com>