sass version added

[zilahir]

I have added scss version of the styles.

The reason I did this, because I prefer sass over less, therefore the project I intended to use this component, is purely based on sass, and using node-sass.

So with this pr users will be able to do scss import, such as:

import './path/to/calendar/style.css

[cutterbl]

I feel bad, as I didn't see this and filed my own PR #1235...

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.