Added api for font-family names

Accessible as ${props => props.theme.typography.title.font} and ${props => props.theme.typography.text.font}

First stable release (BREAKING CHANGES)

• Theming dictionary has been re-written for much easier customization and extendibility.
• Reduced the complexity and number of variables in the dictionary.
• Removed support for font loaders in anticipation of the newest browser releases accepting font-display feature.
• Added comprehensive docs with examples.

Refactoring colours

Changed default brand colour, refactored colour names in examples.

Initial release

Initial release for all style defaults and responsive size utilities.