adding docs again

docs/_functions/domain/A.md

@@ -0,0 +1,26 @@
+---
+name: A
+parameters:
+  - name
+  - address
+  - modifiers...
+---
+
+A adds an A record To a domain. The name should be the relative label for the record. Use `@` for the domain apex.
+
+The address should be an ip address, either a string, or a numeric value obtained via [IP](#IP).
+
+Modifers can be any number of [record modifiers](#record-modifiers) or json objects, which will be merged into the record's metadata.
+
+{% include startExample.html %}
+{% highlight js %}
+
+D("example.com", REGISTRAR, DnsProvider("R53"),
+  A("@", "1.2.3.4"),
+  A("foo", "2.3.4.5"),
+  A("test.foo", IP("1.2.3.4"), TTL(5000)),
+  A("*", "1.2.3.4", {foo: 42})
+);
+
+{%endhighlight%}
+{% include endExample.html %}