Add schema to repo for now

pi_mqtt_gpio/__init__.py

-import sys
-print("FATAL ERROR: The file at pi_mqtt_gpio/__init__.py should be replaced us"
-      "ing 'make schema' before packaging.")
-sys.exit(1)
+import yaml
+
+CONFIG_SCHEMA = yaml.load("""
+mqtt:
+  type: dict
+  required: yes
+  schema:
+    host:
+      type: string
+      empty: no
+      required: no
+      default: localhost
+    port:
+      type: integer
+      min: 1
+      max: 65535
+      required: no
+      default: 1883
+    user:
+      type: string
+      required: no
+      default: ""
+    password:
+      type: string
+      required: no
+      default: ""
+    client_id:
+      type: string
+      required: no
+      default: ""
+    topic_prefix:
+      type: string
+      required: no
+      default: ""
+      coerce: rstrip_slash
+    protocol:
+      type: string
+      required: no
+      empty: no
+      coerce: tostring
+      default: "3.1.1"
+      allowed:
+        - "3.1"
+        - "3.1.1"
+    status_topic:
+      type: string
+      required: no
+      default: status
+    status_payload_running:
+      type: string
+      required: no
+      default: running
+    status_payload_stopped:
+      type: string
+      required: no
+      default: stopped
+    status_payload_dead:
+      type: string
+      required: no
+      default: dead
+
+gpio_modules:
+  type: list
+  required: yes
+  schema:
+    type: dict
+    allow_unknown: yes
+    schema:
+      name:
+        type: string
+        required: yes
+        empty: no
+      module:
+        type: string
+        required: yes
+        empty: no
+      cleanup:
+        type: boolean
+        required: no
+        default: yes
+
+digital_inputs:
+  type: list
+  required: no
+  default: []
+  schema:
+    type: dict
+    schema:
+      name:
+        type: string
+        required: yes
+        empty: no
+      module:
+        type: string
+        required: yes
+        empty: no
+      pin:
+        type: integer
+        required: yes
+        min: 0
+      on_payload:
+        type: string
+        required: yes
+        empty: no
+      off_payload:
+        type: string
+        required: yes
+        empty: no
+      pullup:
+        type: boolean
+        required: no
+        default: no
+      pulldown:
+        type: boolean
+        required: no
+        default: no
+      retain:
+        type: boolean
+        required: no
+        default: no
+
+digital_outputs:
+  type: list
+  required: no
+  default: []
+  schema:
+    type: dict
+    schema:
+      name:
+        type: string
+        required: yes
+      module:
+        type: string
+        required: yes
+      pin:
+        type: integer
+        required: yes
+        min: 0
+      on_payload:
+        type: string
+        required: no
+        empty: no
+      off_payload:
+        type: string
+        required: no
+        empty: no
+      inverted:
+        type: boolean
+        required: no
+        default: no
+      initial:
+        type: string
+        required: no
+        allowed:
+          - high
+          - low
+      retain:
+        type: boolean
+        required: no
+        default: no
+
+
+""")