rename course-intro to course and fixed style
remove unecessary import
calculate position for new units
tests for position counter in Unit
Merge branch 'master' of github.com:hacklabr/timtec
improve travis config
missing requirements
angular improvements
go to next video on unit end.
unit display starting at 1 not 0.
require django-extensions and set up admin-docs

(provides shell_plus, show_urls and many other commands) and admin-docs also helps
navigating models, views and other stuff.
conector for postgresql
fix tags docs

pygments was missing from requirements
fix django 1.6 compatibility
move to django 1.6
setup instructions for staging deploy
fix mkdir in makefile
fix allowed host for staging
update django allowed_hosts
a simple install rule