New Features

Add -StrokeColor and -StrokeWidth parameters - add outlines to your words!
Add -BoxCollisions switch to revert back to prior collision detection behaviour
Add -Padding parameter to increase or decrease word collision boundary sizing; value of 1 is the default. Zero is close enough to touch, higher values can be used to allow the cloud to be spaced out more evenly and tends to look a little nicer, but take a lot longer.
Add -AllowOverflow switch to permit the word cloud to overflow the image boundaries somewhat
Display Write-Progress information of where words are being placed and how far along the rendering is
Add -RandomSeed param to let you pick how the randomness behave. In theory, identical inputs should behave roughly identically with the same selected seed value.
Add -FocusWord to allow you to specify a "title" or "center word" for the cloud to surround.

Bug Fixes

Fixed issue in the argument transformations for the [Color]-typed parameters; you can enter custom colors in string formats properly now.
Add rotation checks for both orientations at each position (first chosen orientation selected randomly)
Use Region to store paths and check IsVisible against the new word's bounds to get much more finely-tuned overlap detection
Fix up -WordScale param to... actually work...
Allow setting 0 on -MaxWords to display all words that scale large enough to be rendered.
Set fixed resolution values to 96 DPI to hopefully fix some issues on Mac OS.