updates to fellows content

added outstanding content from git content documents for all fellows
including new fellows
open tag page
update privacy and open tag pages
update announcement with new fellows links
anchors
anchor fix
update new fellows base url
update home about anchor
Adjusted _config.yml settings and updated github URL in _includes/default.html
Updated layout variable in yml header of feed.xml from none to nil
grammar fix - changed Don't to Don'ts in Application Checklist sub-heading
Changed Blog to Thinking for consistency
Removed doublespaces and added new copy to Peter Bloom's bio
Removed double spaces and added links. Also fixed relative path for twitter logo
Sean Bonner - removed double spaces and added links. Also fixed relative path for twitter logo
New fellows images and fixed image path for Peter Bloom
New fellows images and fixed image path for Peter Bloom
Images of new fellows
Added new fellows to homepage
tags page fixes and breadcrumbs