Adds new icons and moves OTF file to source folder

I moved the source OTF file out of the `fonts` folder and into a new `font-source` folder. There is also a `generator_config.txt` file that Font Squirrel spits out so we can all use the same settings when generating new font files.

I named these new icons generically instead of naming them after any products. I feel like this will make them easier to remember and more reusable.