Merge pull request #167 from gpleiss/feature/configurable_warnings

Configureable option for exiting on warnings
Merge pull request #166 from bebepeng/feature/duplicate-name-warning

Display warning when multiple components have the same name.
Add ability to reference link to other components in docs.

To link to the "typography" component on the "css.html" page from
another component's docs, you can now do
`[link to typography][typography]`
instead of
`[link to typography](/css.html#typography)'.
Add docs for component reference links