Add/remove starred locations via sitewide cookies

Added:
+ Add/remove location id from cookie string on button toggle
+ sync UI to saved favorites on page load
+ Add listeners for toggling/clearing/sharing favorites
+ Favorites button on browse page shows correct number of current favorites 
+ Clear Favorites button on starred page works correctly
+ Update miscellaneous links
+ Update text. Favorites --> Starred

TODO:
+ Implement sharing listener (This is a separate card and is noted in the source comments)