Search v1 (#19)

* Adds description to media items; hooks it up to indexing/media downloading

* Added a search method using postgres fulltext search

* Hooked up search functionality to the search form

* Added persistence to the search form when on search page

test/support/fixtures/media_source_fixtures.ex

@@ -36,19 +36,22 @@ defmodule Pinchflat.MediaSourceFixtures do
         id: "video1",
         title: "Video 1",
         original_url: "https://example.com/video1",
-        was_live: false
+        was_live: false,
+        description: "desc1"
       },
       %{
         id: "video2",
         title: "Video 2",
         original_url: "https://example.com/video2",
-        was_live: true
+        was_live: true,
+        description: "desc2"
       },
       %{
         id: "video3",
         title: "Video 3",
         original_url: "https://example.com/video3",
-        was_live: false
+        was_live: false,
+        description: "desc3"
       }
     ]