change "containingElementFooter" class name to "innerWrapperNavFooter" site-wide
change "innerWrapperNavFooter" class name to "outerWrapperNavFooter" site-wide
make footer-related updates

add <div class="innerWrapperNavFooter"> to wrap all footer elements inside a 900px box.  change the color of the bootom border of all the headers in all the <sections> of <footer>.
css changes related to the previous commit (91f0725465deb21aaf...)
create footer partial & add hidden text to social network links (see message)

create "_includes/footer_partial.html" to store all footer code. in the footer code are social networking links...copy was add inside href tag for accessibilty purposes.  the copy is thrown off the page with a negative tex indent.
space out footer <section> tags with css
add footer background image (see msg)

add skyline image to footer background in tablet/desktop view only...needs tweaking.
push both production and development copies of styles.css to GitHub