Mix in Klavika font on index and overview

The fonts are served from Typekit.com, you will not see them
unless you are loading the site from:
- localhost
- 0.0.0.0
- 127.0.0.1
- *.apache.org
- *.github.io

I can add more domains in our Typekit configuration.
Merge pull request #1 from timanglade/gh-pages

Mix in Klavika font on index and overview