Remove old 'guis.rbxl' place.
Add wip Tweening module.
Simplify the 'merge' function.

Apparently it doesn't override the original table now. Not sure
what I'm doing differently, I guess it's something with the variables.
Temporarily pass options as parameters.

This is just a hack to get it in working order. All of the options
variables will be passed as a single variable in the future.
Add 'size' and 'sizeAndPosition' methods.
Change name of the 'options' variable and have Tween calls on one line.
Edit the 'merge' function so it won't override original tables.
Edit usage example to include offsets in the udim table.
Tweak the main comment block and add new paragraphs.
Change 'speed' to 'time' to match the default Tweening param.