add feed title between items

* modified the returning structure of get_all_feed_user_items
* modified query used in querying items
* modified frontend js accordingly

* fix on subscribing to new feed return feed_id
 user_feeds.user_id & feed_id to UK, guid_hash

* fix adding duplicate items by add hashed guid viz. a unique key and
* insert ignore statement
* UK added to user_feeds.user_id & feed_id, to prevent same user subscribing to same feed
* index.html remove local jquery use cdn
* added bash script to take mysqldump
fix script to take backup
Merge pull request #24 from vkarthik26/master

Multiple changes. All detailed in respective commits.