Merge pull request #38 from Livefyre/font-sizes

Introduce small/medium/large font-size themes
Remove 'theme' opt, as Light/Dark theme option generation is moving into designer.
Bump prelease ver to 3.2.0-beta.14
Fix path for tinycolor dep
Bump livefyre-theme-styler dep. Bump prelease ver to 3.2.0-beta.15
Remove unused theme configs
Bump livefyre-theme-styler dep to v0.1.1
Bump pre-release package ver to 3.2.0-beta.16
Add link styling to themes demo
Merge from theme-colors