Drop autocomplete for now

[amihaiemil]

Let's drop autocomplete and just use "search-as-you-type", for 2 reasons:

• it takes a lot of time to implement the completion suggestion in elasticsearch. See here
• it is very difficult and bug prompt from the front-end's pov. How do you show both autocomplete and search results in a cool manner, without having the user add all sorts of css? There is the problem that the searc results component has to be a child of the input component etc.

We solve this issue by simply having search-as-you-type functionality instead of autocomplete and no actual search results. In the end it will look like a simple widget that the user adds on a page and while he types, results appear right beneath the search field.

In this ticket: drop all the uncalled code related to autocomplete, implemented so far, and remove todos for the now-obsolete puzzles: #157 #158 #159 #160

[amihaiemil]

done 14bf475