The ot library is tricky to load with Webpack, as it writes
it's functions into a global `ot` object and does not export anything.
I got it working using `exports-loader` to put the `ot` object
into a CommonJS export and then forcing Webpack to only
load using CommonJS.
Signed-off-by: David Mehren <git@herrmehren.de>
bd62e79f7d