Remove blue border around ET logo on homepage
Adjusted ET logo to fill space without blue border
Add About page with initial copy
Ensure new pages & posts use .md extension, rename existing posts
Clean up About Us copy

* Grammar tweaks
* Simplify & strengthen some phrasing
* Use list to structure “popular tools” items
Chang layout: nil to layout: null as per jekyll/jekyll#2620

Inspired by mealies/oscailte@241ef1b
Fix display of dates, as per imathis/octopress#1624

The actual fix is most easily seen in paskal/octostrap3@a8c7f77
Optimize images for Archiva post
Optimize some site-wide images
Use self-hosted image instead of Tumblr
Import posts from Tumble dev blog

The `post` folder provides for easy redirection to the new posts,
once the devs.evertrue.com domain is pointed to the new site
Redirect old blog posts to evertrue.github.io

If we ever switch back to devs.evertrue.com, revert this commit
Show EverTrue Twitter stream in sidebar
Display tags/categories on their own row
Add author to posts