Convert files in the root of source/ to Haml

I converted the pages in Markdown to haml for consistency. Blog posts
are really the only thing that should be in markdown format.
Convert layout.erb to Haml and remove homepage layout

Currently the home page will be somewhat broken because I removed its
layout which also had a class of "home" applied to the body.

This was dumb and will be revised in coming stylesheet changes.
Add .gitattributes

I found this in the GitHub gui under repository settings and figured it
couldn't hurt to add it to the repo.
Remove custom layout for home page from config.rb

Styles are currently broken for the index page, as the homepage layout
had a class of "home" applied to the body.

Using one layout for all pages, this class is absent and this error will
be revised in the stylesheets soon.
Move current css file to 'tmp_ref' directory

I'm moving all of the css files to this temporary location to make
it easier on myself to focus on redoing all my styling.
Add new 'master' stylesheet and Normalize for Compass

Also updated the path in the defualt layout to point to screen.scss
instead of master.scss
Update screen.scss

- Updated sub-section formatting
- Updated color variable values
- Remove box-sizing include
- Updated base font-family
- Updated elements in typography section
- Add "Page Structure" section
Adjust font sizes and page rhythm, fix indentation
Convert indentation to spaces in screen.scss
Move contents of Config section to _base.scss

I did a couple other minor changes and Vertical Rhythm appears to be
working properly as of this commit.
Change Header and Link colors
Add 'Responsive Rules' section
Replace normalize.scss with normalize.css

The Sass based version of Normalize was not going to work well with
Vertical Rhythm because of how it was doing the Headers, so I replaced
it with the normal CSS version of Normalize.
Add Header stylings, use Rhythm mixin for setting base margins
Update middleman gem to latest version (3.1.6)
Use carets to denote sections
Implement Susy grid system
Remove styling for 'small' element, move 'massive type' subsection
Complete .hr--gradient class
Add middleman-syntax and redcarpet gems