add mixin for border color
introduce the .block class

.block gives things a white background and a $border-color border
the_show function does not accept its params and has an incorrect @param defined in docblock.

also noted for use in loop only
add style for h3.section-header in style.scss as defined in typography spec. also: style for header-block
featured video section
#container and #content clearfix. 2.2em padding-top on #footer
some things are more like sections and not like blocks. other things are more like containers and not like blocks.

either way, we call too many things "blocks"
top margin on #footer was not effective. try again.
featured buttons with proper typography and background pattern
block-header styles
header styles
recent blog posts - NEEDS WORK!