[Huge] Util Refactor, Dashboard Improvements, Hass.io Auth API, Better Validation Errors, Conditions, Custom Platforms, Substitutions (#234)

* Implement custom sensor platform

* Update

* Ethernet

* Lint

* Fix

* Login page

* Rename cookie secret

* Update manifest

* Update cookie check logic

* Favicon

* Fix

* Favicon manifest

* Fix

* Fix

* Fix

* Use hostname

* Message

* Temporary commit for screenshot

* Automatic board selection

* Undo temporary commit

* Update esphomeyaml-edge

* In-dashboard editing and hosting files locally

* Update esphomeyaml-edge

* Better ANSI color escaping

* Message

* Lint

* Download Efficiency

* Fix gitlab

* Fix

* Rename extra_libraries to libraries

* Add example

* Update README.md

* Update README.md

* Update README.md

* HassIO -> Hass.io

* Updates

* Add update available notice

* Update

* Fix substitutions

* Better error message

* Re-do dashboard ANSI colors

* Only include FastLED if user says so

* Autoscroll logs

* Remove old checks

* Use safer RedirectText

* Improvements

* Fix

* Use enviornment variable

* Use http://hassio/host/info

* Fix conditions

* Update platformio versions

* Revert "Use enviornment variable"

This reverts commit 7f038eb5d2.

* Fix

* README update

* Temp

* Better invalid config messages

* Platformio debug

* Improve error messages

* Debug

* Remove debug

* Multi Conf

* Update

* Better paths

* Remove unused

* Fixes

* Lint

* lib_ignore

* Try fix platformio colors

* Fix dashboard scrolling

* Revert

* Lint

* Revert

esphomeyaml/components/sensor/xiaomi_miflora.py

@@ -6,7 +6,7 @@ from esphomeyaml.components.esp32_ble_tracker import CONF_ESP32_BLE_ID, ESP32BLE
 import esphomeyaml.config_validation as cv
 from esphomeyaml.const import CONF_BATTERY_LEVEL, CONF_CONDUCTIVITY, CONF_ID, CONF_ILLUMINANCE, \
     CONF_MAC_ADDRESS, CONF_MOISTURE, CONF_NAME, CONF_TEMPERATURE
-from esphomeyaml.helpers import Pvariable, get_variable
+from esphomeyaml.cpp_generator import get_variable, Pvariable
 
 DEPENDENCIES = ['esp32_ble_tracker']