Add the very first http check and message notifier

amonit/check/http.py

+import requests
+
+
+def simple(url, expected_code=None, expected_string=None):
+    req = requests.get(url)
+    if expected_code and req.status_code != expected_code:
+        raise RuntimeError("HTTP code should be {}".format(expected_code))
+    if expected_string and string not in req.text:
+        raise RuntimeError("Result did not contain expected string")

amonit/notifier/message.py

+from matrix_client import client as matrix_client
+
+from amonit import util
+
+
+def mail(name, state, title, body):
+    print(name, state, title, body)
+
+
+def matrix_room(name, state, hs, token, roomid, message):
+    matrix = matrix_client.MatrixHttpApi(hs, token=token)
+    message = util.render(message, state)
+    matrix.send_message(roomid, message)