Added docs for Namecheap registrar provider (#67)

docs/_providers/namecheap.md

@@ -0,0 +1,48 @@
+---
+name: "Namecheap"
+layout: default
+jsId: NAMECHEAP
+---
+
+# Namecheap Provider
+
+Namecheap only provides a registrar provider implementation.
+
+## Configuration
+
+In your providers config json file you must provide your Namecheap api
+username and key:
+
+{% highlight json %}
+{
+  "namecheap.com":{
+    "apikey": "yourApiKeyFromNameCheap",
+    "apiuser": "yourUsername"
+  }
+}
+{% endhighlight %}
+
+## Metadata
+
+This provider does not recognize any special metadata fields unique to
+Namecheap.
+
+## Usage
+
+Example javascript:
+
+{% highlight js %}
+var namecheap = NewRegistrar("namecheap.com","NAMECHEAP");
+var R53 = NewDnsProvider("r53", ROUTE53);
+
+D("example.tld", namecheap, DnsProvider(R53),
+    A("test","1.2.3.4")
+);
+{%endhighlight%}
+
+## Activation
+
+In order to activate api functionality on your Namecheap account, you must
+enable it for your account and wait for their review process. More information
+on enabling API access is [located
+here](https://www.namecheap.com/support/api/intro.aspx).