Cover position tilt (esphome#582)

## Description:

Also contains other stuff (working locally and I don't want to bother with untangling local changes)

- Removes old OTA support
- Refactor light class to be more like other components

**Related issue (if applicable):** fixes <link to issue>

**Pull request in [esphome](https://github.com/esphome/esphome) with python changes (if applicable):** esphome/esphome#<esphome PR number goes here>
**Pull request in [esphome-docs](https://github.com/esphome/esphome-docs) with documentation (if applicable):** esphome/esphome-docs#<esphome-docs PR number goes here>

## Checklist:

  - [ ] The code change is tested and works locally.
  - [ ] The code change follows the [standards](https://esphome.io/guides/contributing.html#contributing-to-esphome-core)

If user exposed functionality or configuration variables are added/changed:
  - [ ] Documentation added/updated in [esphome-docs](https://github.com/esphome/esphome-docs).

platformio.ini

@@ -20,7 +20,6 @@ build_flags =
     -DUSE_FAST_LED_LIGHT
     -DUSE_NEO_PIXEL_BUS_LIGHT
     -DDONT_STORE_LOG_STR_IN_FLASH
-    -DUSE_NEW_OTA
 ; Don't use FlashStringHelper for debug builds because CLion freaks out for all
 ; log messages
 src_filter = +<src>