Consider Folder Icons for Common Folders

I'm not entirely sure if this is within the scope of this icon-set or would be better suited for a custom extension of it, but it would be nice to have folder-icons (like the pictures, download, documents, etc. folders) for other common things such as Git, Code, etc.

---
Want to back this issue? **[Post a bounty on it!](https://www.bountysource.com/issues/65380763-consider-folder-icons-for-common-folders?utm_campaign=plugin&utm_content=tracker%2F27377189&utm_medium=issues&utm_source=github)** We accept bounties via [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F27377189&utm_medium=issues&utm_source=github).