Allow some degree of configuration

[FZ-Iskandar]

It would be great if you could give a third parameter to the methods with a few configuration options, like for example:

• comparing operator: Strict (===) or Loose(==). And set the default to strict to not break backwards compatibility
• determining null/empty: For example a null value recovered from the DB could be considered "the same" as an empty string comming from a text input.

Just some ideas of configurations that could be set

[ioev]

I ran into a case recently where I was diffing some objects that contained arrays, and I didn't care about the ordering of the arrays. Being able to specify this as a config option would be nice (currently defaults to returning a diff entry.)