Command registerNormalization

- NOTE: This documentation is for Velocity v2.

Command - RegisterNormalization

Normalizations are registered via the "registerNormalization" command. This takes a property name, and a callback which takes the element and an optional value as arguments. If the value is undefined, then this is a get action, otherwise it is a set action. In addition, if the set action returns a false-ey value then it will automatically set the css style of the same propertyName to the same value (so return true to skip this).