Customizable Shower Hook

I made a customizable shower hook because the ones I liked didn't fit my glass. I used the code by [mrmath3](https://www.thingiverse.com/thing:3020490) and added the cut-off idea from [leliep](https://www.thingiverse.com/thing:3224958) to make it support free. I also added an option to make it double sided.