Add Tumblr icon

I had to replace the entire font and all icons codes changed. If we
need to add new icons, we can upload config.json to http://fontello.com
and it'll select all our current icons. That way we can easily add new
ones.
Minor tweaks.
Fixed oops.
Include social extention.
Add semi colon. props @rrennick
Email address mailto exception.
Minor tweaks.
Ooops.
Spacing fixes and minor tweaks.
Update spelling.
added new filters

added default values filter for CSS defaults, available social profiles,
CSS file location, and glyphs to allow for theme level customization
Merge pull request #3 from norcross/develop

added new filters
Version bump.