1.0.0-alpha.1

Added:

- Form components:
  - RadioGroup component for grouping in a fieldset different checkbox
    options.

Changed:

- Cols will now expand horizontally and use the the whole container
  width.
- Color palette now uses hexadecimal colors rather than `rgb()`
  expressions.

1.0.0-alpha.0

This is the first alpha. It adds a couple of components and selectors as
a proof of concept. Now, Genshi will be integrated in other repositories
to test the connection. After the integration is done, more components
will be moved here.

Added:

- Current typography and color settings
- Layout components:
  - Columns: displays content in columns using a flex layout.
  - Stack: presents content in an horizontal or vertical stack using a
    flex layout.
  - Wrapper: pads horizontally the content of a page in the viewport.
- Form components:
  - Input: general styles for most `<input>` components.
  - Button: your average button component for forms and links.
  - Select: specific styles for the `<select>` selector.