Included NIB name, and Storyboard when appropriate.

With bigger projects, knowing the class of a view controller is often not sufficient to find what’s going on:
Multiple instances of the same view controller class exist, typically configured in a NIB — either via individual XIBs, or in scenes of one or more storyboards.
This commit adds that information to the label.
Demoted Swizzle() from a global function to static

The `Swizzle()` function was defined in the global scope, although its prototype wasn’t declared anywhere.
Because its existence is a purely private concern to this category, it has been marked as `static`, to no longer pollute the global namespace.
To avoid a warning when compiling with `-Wpedantic`, it has additionally been marked as `inline`.
Merge pull request #1 from danyowdee/show-IB-names

Show IB names