Move 'deploy' command into deploy.py

If function 'deploy' is defined in __init__.py it masks the imported module
with the same name. Placing it into deploy.py file is more logical
structure-wise.

To make sure that the command is still accessible by its old name, it is marked
as a default task for 'deploy' module.

__init__.py

@@ -76,13 +76,3 @@ def release():
 
     execute(drush.archive_dump)
     execute(drush.gen_doc)
-
-
-@task
-def deploy(environment):
-    """Deploy code and run database updates on a target Drupal environment.
-    """
-
-    execute(provision, environment)
-    execute(push, environment, hosts=env.hosts)
-    execute(migrate, environment, hosts=env.hosts)

deploy.py

@@ -156,6 +156,16 @@ def _aegir_remove_platform_without_sites(target, environment, platform):
     run('{}/remove-platforms {} {}'.format(aegir_path, environment, platform))
 
 
+@task(default=True)
+def deploy(environment):
+    """Deploy code and run database updates on a target Drupal environment.
+    """
+
+    execute(provision, environment)
+    execute(push, environment, hosts=env.hosts)
+    execute(migrate, environment, hosts=env.hosts)
+
+
 @task
 def provision(environment, role='local'):
     """