Rename esphomeyaml to esphome (#426)

* Rename

* Update

* Add migration

* Fix

* Fix dashboard

* Change test

* Fixes

* Code cleanup

* Fix import order

* Update

* Automate docker builds

* Shellcheck

tests/test2.yaml

@@ -1,10 +1,12 @@
-esphomeyaml:
+esphome:
   name: $devicename
   platform: ESP32
   board: nodemcu-32s
   # Use this for testing while developing:
-  # esphomelib_version:
-  #   local: ~/path/to/esphomelib
+  # Note the travis check for esphome PRs will fail until the
+  # esphome-core PR has been merged.
+  # esphome_core_version:
+  #   local: ~/path/to/esphome-core
   build_path: build/test2
 
 substitutions:
@@ -179,7 +181,7 @@ status_led:
 
 text_sensor:
   - platform: version
-    name: "Esphomelib Version"
+    name: "ESPHome Version"
     icon: mdi:icon
     id: version_sensor
     on_value: