Importing multiple palettes
First, thank you for making the plugin. It’s very useful and I’m using it all the time to manage color schemes in Sketch.

I wanted to separate all the Material Design colors into their own respective `.sketchpalete` files so that I could select only the colors I need for each project (e.g. `material-design-red.sketchpalette`, `material-design-pink.sketchpalette`, etc.), rather than having all of the Material colors at once. 

However, it seems when I load a palette it overwrites the previous one. It seems it replaces the current palette with the new one. Is this a bug or just a use case that the plugin doesn’t handle?
