Export to copy & pasteable data uri

SVG data uri works with IE9 and above, it's a great way to put custom hamburger / close / arrows etc. directly to CSS.

To get data uri to work with IE9 (other browsers works with incorrect urlencoding) and above only thing required is urlencoding at least the `<` and `>` signs:

E.g. my little hamburger:

`
background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 110 110'%3E%3Cpath d='M 0,50 H 110 V 60 H 0 Z'/%3E%3Cpath d='M 0,20 H 110 V 30 H 0 Z'/%3E%3Cpath d='M 0,80 H 110 V 90 H 0 Z'/%3E%3C/svg%3E");
`

Note that `data:image/svg+xml;charset=utf8,` should not be escaped.

Problem is to get small data-uris, your tool creates them already. Only thing required is a way to get data uri easily out of the tool.

Also, I would like to have custom viewBox size e.g. 110x110, and custom grid settings (so that grid aligns with certain drawings better).

Thanks.