Add css for tooltips

This is a 3rd party library for tooltips using just CSS
Remove prototype libraries
Remove javascript/bootstrap tooltips, now using css
Add tooltip to star
Add tooltips for directions, starring, and more/less info
Formatting
Add tooltip for explore button
Add tooltip for geolocation
Use 3rd party library for css tooltips
Add tooltip to share, refine, and view starred buttons
Use django provided translation for tooltip
Add < IE8 warning to homepage
Merge remote-tracking branch 'upstream/staging' into topic/tooltips

Conflicts:
	python/ecep/portal/static/js/cel/templates/locationList.html
	python/ecep/portal/templates/base-search.html
	python/ecep/portal/templates/browse.html
Move ie-alert to navbar and add close button for dismissal
Oops. Add conditional comments.
Remove extra letter (?)
Add tooltip for explore button translation
Fix initial tooltip for filters
Fix tooltip for more information
Add translated star tooltip from json