UI fixes and improvements for search page
Preserved fields :start and :end changed to :after and :before
Update README.md
Timeline model and some changes
Better_errors gem added
Binding_of_caller gem added
Timeline year change via ajax
New config for API with http auth (use: config/settings.local.yml)
Merge remote-tracking branch 'origin/timeline' into timeline

Conflicts:
	app/controllers/search_controller.rb
	app/models/timeline.rb
	app/views/search/timeline.html.haml