Styles for standardising radiobutton checkboxes

Adding styles for standardising radio buttons and checkboxes
• Add the new styles
• Tweak button styles because labels are now floated
• Add contains floats to to list of buttons

https://www.agileplannerapp.com/boards/105200/cards/5197
I'm a little nervous about this addition. Are there no existing "medium buttons" which sit next to another button?