Default button styles

[grmoon]

Currently, in order to style a button we need the classes ray-button and one of ray-button--primary, ray-button--secondary, etc. However ray-button by itself doesn't have complete default styling, so the modifiers don't feel exactly like modifiers.

Perhaps we can collapse the ray-button ray-button--primary styles into just default styles for ray-button?

[adamraider]

@grmoon Good suggestion. Be the change in which you wish to see. ✨ ❤️