Updated header and footer to include branding for site name. Updated header to check child theme's images dir, and added logo.

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
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# Date:      Wed Feb 10 03:30:36 2016 -0500
#
# On branch master
# Changes to be committed:
#	new file:   footer.php
#	new file:   header.php
#	new file:   images/logo.png
#	modified:   style.css
#
