added method for user interest based tags,
made event feed view retrieve a list of events based on users interests using abovementioned method and display them on the page.
Merge remote-tracking branch 'origin/feature/eventSearch' into feature/eventFeed
users now have a individual set for tags they are subscribed to. added methods for adding subscriptions. remade method getFeedTags to return the content of this set.
index method in EventFeed now creates a user and add tags to its subscription set which is then used to retrieve events.
removed header text from index.scala for eventfeed.
refactored search method
removed superfluous method in User (since field "subscription" is public)
added placeholder stuff to eventfeed view
added reminder to remove a route used for testing not intended in the final product
combined eventSearch.doSearch and eventSearch.index into one method.
removed POST from route
rewrote some code in eventSearch view