v0.4 - Safari, Firefox, and new parameters

Most importantly, fixed a bug where the library wasn't working on non-Chrome browsers.

You can now include a mobileWidth parameter to disable the library below a certain screen width, and you can set clearOriginalContent to false to keep the original text content of the Sub container and seemlessly transition to the first of a non-random rotation.

Fix mis-indexing problem

Index classes are now <namespace>-from-idx-<index> and <namespace>-to-idx-<index>, rather than always being idx-<index>.

It's substituteteacher.js now

Note that all API functions, imports, and the repo have changed from Replace to Sub.

Basic Features Exist

v0.1

remove requirejs