Added carousel to landing page - still unfinished

Needs: styling, slide navigation buttons
Merge branch 'master' of github.com:jamalex/ka-lite

Conflicts:
	kalite/templates/central/landing_page.html
Merge branch 'develop'

Conflicts:
	kalite/static/images/landing-page/coach-reports-cropped.png
	kalite/static/images/landing-page/exercises-cropped.png
	kalite/static/images/landing-page/subtitle-mashup.png
	kalite/static/images/landing-page/vid-down-cropped.png
	kalite/templates/central/landing_page.html
persuaded the install script to work with python2
Merge pull request #7 from mrshu/python2

Making the install script work with python2 (in cases where python3 is default)
Fixed a link in the README.
Merge branch 'master' into develop
Fixes to landing page.
using python2 wherever possible
Disable Google Analytics for logged-in staff users.
Fixed Pinterest share button.
More descriptive page titles on central server.
Added Django-faq.
Merge branch 'develop' of github.com:jamalex/ka-lite into develop
Set up basic FAQ functionality.
Added styling and better wording to FAQ
Moved content storage directory and fixed up subtitle downloading.
Bumped version number, now that content download location has changed.
Merge branch 'develop' of github.com:jamalex/ka-lite into develop
Suppress output while moving content files in batch file.