changed bg-image on callout

main-nav menu items
	- changed some icons
	- reordered
	- added media queries to make collapse more intuitive

students
	- changed linked-in fa icon
	- remove icon if unemployed
	- remove 'posts' for current session user table
trying updated site.url
trying updated site.url
trying updated site.url
trying updated site.url
made site fork usable by making links more relative
made site fork usable by making links more relative
reordered main_nav
reordered main_nav
updated student table and records
made site fork usable by making links more relative
last details
last details
Merge pull request #54 from c43/master

Ease of use / Cosmetic tedium