Fix some load order issues

lib/mail_catcher/web/application.rb

@@ -7,7 +7,6 @@ require "skinny"
 
 require "mail_catcher/events"
 require "mail_catcher/mail"
-require "mail_catcher/web"
 
 class Sinatra::Request
   include Skinny::Helpers

lib/mail_catcher/web/assets.rb

@@ -2,12 +2,10 @@ require "sprockets"
 require "sprockets-sass"
 require "compass"
 
-require "mail_catcher/web/application"
-
 module MailCatcher
   module Web
-    Assets = Sprockets::Environment.new(Application.root).tap do |sprockets|
-      Dir["#{Application.root}/{,vendor}/assets/*"].each do |path|
+    Assets = Sprockets::Environment.new(File.expand_path("#{__FILE__}/../../../..")).tap do |sprockets|
+      Dir["#{sprockets.root}/{,vendor}/assets/*"].each do |path|
         sprockets.append_path(path)
       end
     end

spec/acceptance_spec.rb

@@ -1,3 +1,5 @@
+ENV["MAILCATCHER_ENV"] = "test"
+
 require "minitest/autorun"
 require "mail_catcher"
 require "socket"