added typeahead library
reorder js includeds so that new typeahead is used
brought in gems for search
defined curator on the dataset
added ugly, but working, implementation of the typeahead search
added typeahead library
Merge branch 'master' into typeahead

Conflicts:
	Gemfile.lock
	db/schema.rb
serve typeahead suggestions in a more appropriate format
switch to typeahead url on selecting an option
allow dataset to be loaded by unauthenticated user
formatting typeahead responses and avoiding null publishers
updated datasets#typeahead test to use certificates
implemented jurisdiction and publisher filters
interpolate the levels translation (prevent 'level' for each certificate)
title in header for dataset#show
removed lodash - now unnecessary
altered outstanding requirements slightly to prevent double querying
store the attained level on the response_set when published
removed cruft comments
corrected where-params of migration