Add flags for stage and advanced (#1108)

* Add advanced flag and stage

* flag more

* remove cec

dhcp_server/config.json

@@ -5,6 +5,7 @@
   "description": "A simple DHCP server",
   "url": "https://home-assistant.io/addons/dhcp_server/",
   "arch": ["armhf", "armv7", "aarch64", "amd64", "i386"],
+  "advanced": true,
   "startup": "system",
   "boot": "auto",
   "host_network": true,

dnsmasq/config.json

@@ -5,6 +5,7 @@
   "description": "A simple DNS server",
   "url": "https://github.com/home-assistant/hassio-addons/tree/master/dnsmasq",
   "arch": ["armhf", "armv7", "aarch64", "amd64", "i386"],
+  "advanced": true,
   "startup": "system",
   "boot": "auto",
   "ports": {

git_pull/config.json

@@ -5,6 +5,7 @@
   "description": "Simple git pull to update the local configuration",
   "url": "https://github.com/home-assistant/hassio-addons/tree/master/git_pull",
   "arch": ["armhf", "armv7", "aarch64", "amd64", "i386"],
+  "advanced": true,
   "startup": "services",
   "boot": "manual",
   "hassio_api": true,

google_assistant/config.json

@@ -7,6 +7,8 @@
   "startup": "application",
   "boot": "auto",
   "arch": ["armv7", "amd64"],
+  "advanced": true,
+  "stage": "experimental",
   "map": ["share"],
   "audio": true,
   "ports": {