Refactors services with defaultConfig and polled data.

Much more simpler code base. Each service requires a poll functioon to poll its
status. If type is defined, and the registered '+service.ts' exports a poll
ServicePoller, it will be used. Otherwise, a generic poll mechanism is used.

static/config.yml

@@ -1,14 +0,0 @@
-title: 'Hello World !!'
-subtitle: 'actually, I am a new pilot.'
-
-services:
-  - title: '/Cloud'
-    subtitle: 'Private Cloud Utilities'
-    icon: 'fas fa-cloud'
-    items:
-      - title: 'NAS'
-        subtitle: 'Network Attached Storage'
-        icon: 'fas fa-hard-drive'
-        target: '_blank'
-        url: '/NAS'
-        keywords: 'cloud storage files'