Add IDTECK proximity card component (#7421)

* Added IDTECK proximity card sensor component.

* Changed to a component.

* ✏️ Tweaks

source/_components/idteck_prox.markdown

@@ -0,0 +1,47 @@
+---
+layout: page
+title: "IDTECK Prox Card Reader"
+description: "How to use IDTECK proximity card readers."
+date: 2018-11-14 13:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: idteck.jpg 
+ha_category: Other
+featured: false
+ha_release: 0.85
+ha_iot_class: "Local Push"
+---
+
+[IDTECK](http://www.idteck.com) makes ID systems used to control access and identify users.  This component works with [Proximity Readers](http://www.idteck.com/en/products/proximity-reader-__-card-%26-tag-__125khz) (RFID card readers). The device is connected to Home Assistant through a serial to ethernet converter (NPort).
+
+An `idteck_prox_keycard` event is fired whenever a card or key sequence has been entered.  The event contains 'card' - the card/key sequence, and the 'name' of the card reader.  Checking 'card' against known card numbers can be used as the basis of an entry control system, or as part of a check-in/check-out system.
+
+## {% linkable_title Configuration %}
+
+``` yaml
+# Example configuration.yaml entry
+idteck_prox:
+  - host: host1.domain.com
+    port: 4001
+    name: "Lower Door"
+  - host: host2.domain.com
+    port: 4001
+    name: "Upper Door"
+```
+
+{% configuration %}
+host:
+  description: The hostname or IP address of the ethernet to serial adapter that is connected to the proximity reader.  It is assumed that the adapter has been preconfigured.
+  required: true
+  type: string
+port:
+  description: The port of the ethernet to serial adapter
+  required: true
+  type: port
+name:
+  description: The name of the prox card reader
+  required: true
+  type: string
+{% endconfiguration %}