Rename to Router or make method Handle. A Router should Route, etc.

https://github.com/ImageWare/TLSential/blob/54e3079a1699a0089902a8f3ad6b13d62743215d/ui/ui.go#L27-L30

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###### This issue was generated by [todo](https://todo.jasonet.co) based on a `TODO` comment in 54e3079a1699a0089902a8f3ad6b13d62743215d when #88 was merged. cc @ImageWare.