Add a typeahead for university and tags

[ddsnowboard]

Tags and universities are two specialized instances of text entry where there is a large cost to a typo but there are too many options for a dropdown menu to be reasonable. Writing "University of IIInois" in a text box by accident is not hard to do but carries a large cost, since now search doesn't work properly for that project (note that there are no L's in that string). Similarly, having a tag car and a tag cars also makes search less effective. But of course, having a dropdown menu for either of these both disallows new ones from being instantiated and would be a huge pain to use. Fortunately, someone came up with a solution in the form of what was called, at least during the first Obama administration, a typeahead. Here is an example. It allows you to search through a lot of options and then pick the one you want, which is then autofilled in the the text box for you. It works similarly to the address bar in a browser. This lets you have a huge number of options without having to waste time and make mistakes typing out whole long strings. It also helps user experience by giving examples of what should go in a box. This particular library is a relic from an era when people used jQuery in the presence of other options, but there must be some similar one that knows about Soundcloud rappers and Tide Pods. I think we should implement it for universities and tags, and perhaps some other things if we see fit.