Created profile controller, route and view.

It's under the /profile route rather than /user to avoid clashes with
autogenerated Devise pages.

app/controllers/profile_controller.rb

@@ -0,0 +1,10 @@
+class ProfileController < ApplicationController
+  def show
+    @user = User.find(params[:id])
+
+    respond_to do |format|
+      format.html # show.html.erb
+      format.json { render json: @user }
+    end
+  end
+end

app/views/profile/show.html.haml

@@ -0,0 +1,2 @@
+- content_for :title, "Profile for " + @user.username
+

config/routes.rb

@@ -1,5 +1,5 @@
 Growstuff::Application.routes.draw do
-  resources :crops
+  resources :crops, :profile
 
   devise_for :users