Create API for scrambling methods

Problem/Motivation

In order for other contributed modules to hook into the scrambling module and make sure that it's scrambling is done on execution of the scrambling procedure we need a hook_scramble. Also an API needs to be foreseen in order for every contrib module to use the same methods.

Proposed resolution

Create hook_scramble
Create API Class

API changes

Create API class which contains all the scrambling methods.
Create hook_scramble so that contrib modules can use this hook.