course: toc
fixing left menu links on lesson page
homepage content small revamp
css p in lessons page
margins on images for lessons
replace form with raw mailchimp
mailchimp per course
Merge branch 'master' of github.com:CartoDB/cartodb-academy
adds description & prereq for course 1
better lesson percent
adding github link on the footer fixes #30
fixes
Merge branch 'master' of github.com:CartoDB/cartodb-academy
body default color changed
lesson: fixed header
Merge branch 'master' of github.com:CartoDB/cartodb-academy

Conflicts:
	css/about.css
	css/course.css
	css/home.css
	css/lesson.css
about wip
margin top to crs-share module
Update about.md
cross browsing + syntax