Default colors

[smoku]

Hi @lucek,

Great simple gem, love it :)

I changed the default background colors to "flat colors", I think it looks way better.

Here are the colors I have in mind:
http://flatuicolors.com/
http://bootflat.github.io/color-picker.html

If you are interested in this change I can make a pull request. Additionally what do you think about making it possible to return a Tempfile instead of blob? It's quite useful for carrierwave etc.

[ArturT]

It would be nice to have extra configuration to enable flat colors and settings for tempfile or blob.

[lucek]

@smoku, feel free to do it and open a pull request if you'd like to :)
@ArturT, +1. I think that choosing the colour palette and tempfile/blob would be awesome.

[PenguinGabe]

@smoku did u manage to get down to the pull request? would love to use the default background colors as flat colors