Changes are:
1. If WhiteLabel? plugin is present it will be used for sanitizing. In order for this to happen, acts_as_sanitized should be installed in plugins/whitelist_acts_as_sanitized folder, so that it gets loaded after the WhiteList? plugin.
2. Instead of sanitizing before_save or before_validation, it happens whenever the attribute is assigned, by intercepting the write_attribute method. This will prevent the expensive reg exps from being executed every time the model is saved, which may degrade performance in some cases.
3. Use of TextHelperWrapper? prevent polution of the model's namespace by the methods from TextHelper?.
Let me know if this makes sense :)
