be more specific when checking if option values are empty
the DOCUMENT_ROOT env var is not reliable on many web hosts, stop using it entirely
use custom path_is_absolute() function for better Windows compat, fixes cuny-academic-commons/cbox-theme#101
Only resize avatars in the content area
Fix the Responsive Navigation

Instead of prepending menu to main-menu, prepend it to the new placeholder. This bar is positioned absolutely at the top of the window at al times ala Foundation

Fixes: http://community.presscrew.com/topic/below-header-menu-not-showing/
move menu related markup helpers from responsive layout to responsive menu extension class
added missing file header to sections.ini
added min header height to fix chrome releated responsiveness quirkiness
check if markdown parser class has been loaded before attempting to load
Handle BuddyPress Nav Menu elegantly.
Make some core changes to handle the BuddyPress Navigation Menu elegantly.
Small fixes to the buttons.
icon css tweak
grid css tweak
Trim whitespace.
Tell BuddyPress that Infinity supports it.

See:
https://bpdevel.wordpress.com/2013/02/25/bp-theme-authors-make-sure-your-theme-registers-buddypress-support/
Load Grid CSS last
killed INFINITY_BRANCH constant which was never used
fixed gettext call
moved base functions back into their own file