Feature Request: Add Reset Method for TOPasscodeViewController UI

[inPhilly]

• [X ] I have read this issue template and provided all possible information.
• [X ] I'm NOT using CocoaPods

Hardware / Software

Which version of the library were you using?0.0.1
Which version of iOS are you running?several in simulator
What model of iOS device were you testing on?several in simulator
If using CocoaPods, which version of CocoaPods are you on?N/A

Goals

What is the outcome result you want to achieve with this library? Passcode controller in my app

Expected Results

I do not dismiss the controller when finished, but save it as a child controller to be added back in later. I expect to be able to reset the view so that the user can enter a passcode again.

Actual Results

When I add the controller back in, the last number pressed is still selected.

Feature Request

Add a way to reset the TOPasscodeViewController back to its initial state.

[TimOliver]

Cool! Sounds good! If anyone else wants to make this PR, I'd really appreciate it! :)