Tags support: Allow some level of filtering with tags

1. storage.js: The code in the storage appears to interfere with filtering, as it calls create_filter again, after it already did under stream.js
2. stream.js: creates TagString key on the fly for master_fees, based on Tags key (Tags key corresponds to an array of tags)
3. feed_data.js: the json object now contains Tags key. Use Ambulance as an examble: {"Name": "Ambulance Fee", Tags: ["EMS"]}
4. index.html: reformated the spacing, and displays the TagString in a hidden span (That's how filtering works by searching $(ele).text().indexOf(key) > -1)