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/.gitignore

@@ -1,7 +1,7 @@
-# Gitignore settings for esphomeyaml
+# Gitignore settings for ESPHome
 # This is an example and may include too much for your use-case.
 # You can modify this file to suit your needs.
-/.esphomeyaml/
+/.esphome/
 **/.pioenvs/
 **/.piolibdeps/
 **/lib/