Fix ImportError from 0.110 (#17)

Remove HACS instructions.

README.md

@@ -2,9 +2,7 @@
 
 Creates sensors that provide information about various sun related events.
 
-## Installation
-
-Follow either the HACS or manual installation instructions below.
+Follow the installation instructions below.
 Then add the desired configuration. Here is an example of a typical configuration:
 ```yaml
 sensor:
@@ -18,13 +16,9 @@ binary_sensor:
       - elevation
 ```
 
-### HACS
-
-See [HACS](https://github.com/custom-components/hacs).
-
-### Manual
+## Installation
 
-Alternatively, place a copy of:
+Place a copy of:
 
 [`__init__.py`](custom_components/sun2/__init__.py) at `<config>/custom_components/sun2/__init__.py`  
 [`binary_sensor.py`](custom_components/sun2/binary_sensor.py) at `<config>/custom_components/sun2/binary_sensor.py`  

custom_components/sun2/binary_sensor.py

@@ -4,8 +4,12 @@
 
 import voluptuous as vol
 
-from homeassistant.components.binary_sensor import (
-    BinarySensorDevice, PLATFORM_SCHEMA)
+try:
+    from homeassistant.components.binary_sensor import BinarySensorEntity
+except ImportError:
+    from homeassistant.components.binary_sensor import BinarySensorDevice
+    BinarySensorEntity = BinarySensorDevice
+from homeassistant.components.binary_sensor import PLATFORM_SCHEMA
 from homeassistant.const import (
     CONF_ABOVE, CONF_ELEVATION, CONF_MONITORED_CONDITIONS, CONF_NAME)
 from homeassistant.core import callback
@@ -92,7 +96,7 @@ def _val_cfg(config):
 })
 
 
-class Sun2ElevationSensor(BinarySensorDevice):
+class Sun2ElevationSensor(BinarySensorEntity):
     """Sun2 Elevation Sensor."""
 
     def __init__(self, hass, name, above):