Delete settings.py in favor of envs/*.py, and add a rake task to run a dev…

Delete settings.py in favor of envs/*.py, and add a rake task to run a dev server locally from those settings

rakefile

@@ -38,10 +38,12 @@ task :default => [:pep8, :pylint, :test]
 
 directory REPORT_DIR
 
+desc "Run pep8 on all of djangoapps"
 task :pep8 => REPORT_DIR do
     sh("pep8 --ignore=E501 djangoapps | tee #{REPORT_DIR}/pep8.report")
 end
 
+desc "Run pylint on all of djangoapps"
 task :pylint => REPORT_DIR do
     Dir.chdir("djangoapps") do
         Dir["*"].each do |app|
@@ -50,12 +52,20 @@ task :pylint => REPORT_DIR do
     end
 end
 
+desc "Run all django tests on our djangoapps"
 task :test => REPORT_DIR do
     ENV['NOSE_XUNIT_FILE'] = File.join(REPORT_DIR, "nosetests.xml")
     django_admin = ENV['DJANGO_ADMIN_PATH'] || select_executable('django-admin.py', 'django-admin')
     sh("#{django_admin} test --settings=envs.test --pythonpath=. $(ls djangoapps)")
 end
 
+desc "Start a local server with the specified environment (defaults to dev). Other useful environments are devplus (for dev testing with a real local database)"
+task :runserver, :env do |t, args|
+    args.with_defaults(:env => 'dev')
+    django_admin = ENV['DJANGO_ADMIN_PATH'] || select_executable('django-admin.py', 'django-admin')
+    sh("#{django_admin} runserver --settings=envs.#{args.env} --pythonpath=.")
+end
+
 task :package do
     FileUtils.mkdir_p(BUILD_DIR)