Add namecheap component (#3589)

* Add namecheap component

* Update namecheapdns.markdown

source/_components/namecheapdns.markdown

@@ -0,0 +1,47 @@
+---
+layout: page
+title: "NamecheapDNS"
+description: "Keep your namecheap dynamic DNS up to date"
+date: 2017-10-11 20:16
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: namecheap.png
+ha_category: Utility
+featured: false
+ha_release: 0.56
+---
+
+With the namecheapDNS component you can automatically update your dynamic DNS entry.
+
+<p class='note warning'>
+Namecheap only supports IPv4 adresses to update.
+</p>
+
+To use the component in your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+namecheapdns:
+  host: @
+  domain: example.com
+  access_token: 0123_Dynamic_DNS_Password
+```
+
+{% configuration %}
+  host:
+    description: The host part or "subdomain" part you want to update (If you want your domain leave the @ sign)
+    required: true
+    type: string
+  domain:
+    description: Your namecheap TLD (example.com).
+    required: true
+    type: string
+  access_token:
+    description: The namecheap "Dynamic DNS Password" you can find under the "Advanced DNS" Tab
+    required: true
+    type: string
+{% endconfiguration %}
+
+See the [How do I set up a Host for Dynamic DNS?](https://www.namecheap.com/support/knowledgebase/article.aspx/43/11/how-do-i-set-up-a-host-for-dynamic-dns) for further instructions