Refactor project to new name

The name of the project is being refactored from Privacy Revolver to
Farside. The reasoning behind this is:
1. A shorter name is easier to remember
2. It can stand for "FOSS alternative redirecting service" (which I know
doesn't encapsulate all letters from "farside", but it's close enough).

This commit also includes improvements to the update script for
determining how far along the script is.

lib/farside/application.ex

@@ -0,0 +1,17 @@
+defmodule Farside.Application do
+  @redis_conn Application.fetch_env!(:farside, :redis_conn)
+  @moduledoc false
+
+  use Application
+
+  @impl true
+  def start(_type, _args) do
+    children = [
+      Plug.Cowboy.child_spec(scheme: :http, plug: Farside.Router, options: [port: 4001]),
+      {Redix, {@redis_conn, [name: :redix]}}
+    ]
+
+    opts = [strategy: :one_for_one, name: Farside.Supervisor]
+    Supervisor.start_link(children, opts)
+  end
+end

lib/farside/router.ex

@@ -1,5 +1,5 @@
-defmodule PrivacyRevolver.Router do
-  @fallback_str Application.fetch_env!(:privacy_revolver, :fallback_str)
+defmodule Farside.Router do
+  @fallback_str Application.fetch_env!(:farside, :fallback_str)
 
   use Plug.Router
 

lib/privacy_revolver/application.ex

@@ -1,17 +0,0 @@
-defmodule PrivacyRevolver.Application do
-  @redis_conn Application.fetch_env!(:privacy_revolver, :redis_conn)
-  @moduledoc false
-
-  use Application
-
-  @impl true
-  def start(_type, _args) do
-    children = [
-      Plug.Cowboy.child_spec(scheme: :http, plug: PrivacyRevolver.Router, options: [port: 4001]),
-      {Redix, {@redis_conn, [name: :redix]}}
-    ]
-
-    opts = [strategy: :one_for_one, name: PrivacyRevolver.Supervisor]
-    Supervisor.start_link(children, opts)
-  end
-end