SVG encoding fix

The `transform` attribute in the `<g>` element in a SVG contains transformations to be applied to the current group; these functions are in the form *func(params)*.

The SVG content is encoded into a `.scss` file by `encodeURIComponent` which encodes everything but the  open/close brackets `(`/`)`; compiling the `.scss` file into a `.css` by Sass leads to a truncated CSS.

This fix replace the open/close brackets with the respective URI encoded representation `%28`/`%29`.