Add update component action and scripts (#196)

* Add update component action

* Add script component

esphomeyaml/components/script.py

@@ -0,0 +1,36 @@
+import voluptuous as vol
+
+from esphomeyaml import automation
+from esphomeyaml.automation import ACTION_REGISTRY, maybe_simple_id
+import esphomeyaml.config_validation as cv
+from esphomeyaml.const import CONF_ID
+from esphomeyaml.helpers import NoArg, Pvariable, TemplateArguments, esphomelib_ns, get_variable
+
+Script = esphomelib_ns.Script
+ScriptExecuteAction = esphomelib_ns.ScriptExecuteAction
+
+CONFIG_SCHEMA = vol.All(cv.ensure_list, [automation.validate_automation({
+    vol.Required(CONF_ID): cv.declare_variable_id(Script),
+})])
+
+
+def to_code(config):
+    for conf in config:
+        trigger = Pvariable(conf[CONF_ID], Script.new())
+        automation.build_automation(trigger, NoArg, conf)
+
+
+CONF_SCRIPT_EXECUTE = 'script.execute'
+SCRIPT_EXECUTE_ACTION_SCHEMA = maybe_simple_id({
+    vol.Required(CONF_ID): cv.use_variable_id(Script),
+})
+
+
+@ACTION_REGISTRY.register(CONF_SCRIPT_EXECUTE, SCRIPT_EXECUTE_ACTION_SCHEMA)
+def script_execute_action_to_code(config, action_id, arg_type):
+    template_arg = TemplateArguments(arg_type)
+    for var in get_variable(config[CONF_ID]):
+        yield None
+    rhs = var.make_execute_action(template_arg)
+    type = ScriptExecuteAction.template(arg_type)
+    yield Pvariable(action_id, rhs, type=type)