[dashboard.js] As a user I should be able to search for friends by name

[NathanBland]

Goals

• As a user, from the "Add friend page" I should be able to search for friends with a specific name.

Acceptance

Form exists, and a search can be performed returning a list of names matching the search query. This list provides options to add a user directly from the search results.

Strech/Nice to have

Search is done with something similar to how typehead works, but without jquery.

• This would depend on an API we don't have yet, therefore is a stretch, but not required.