Add blockquote style
Move blockquote styles to _typography.sass
Use a responsive-pixel font size in the footer

Replace the "text-size" declaration, which isn't valid CSS anyway.
Set the line height for all headings to 1

In other words, don't use a line height that is shorter than the
heading text itself.
Slightly reduce the size of top-level headings
Add a Git Tip of the Day: --color-words
Add generated stylesheets