Removed superfluous 'tracks' directory at the root of the repository.

Testing commits to github.

vendor/plugins/selenium-on-rails/tasks/test_acceptance.rake

@@ -0,0 +1,8 @@
+task :test_acceptance => 'test:acceptance'
+namespace :test do
+  desc 'Run Selenium tests in all browsers'
+  task :acceptance do
+    require File.dirname(__FILE__) + '/../lib/selenium_on_rails/acceptance_test_runner'
+    SeleniumOnRails::AcceptanceTestRunner.new.run
+  end
+end