Netflix/denominator — pull request #245 by adriancole (2013-09-18 21:54:47+00:00)
Title: read-only support for route53 aliases

This adds read-only support for route53 aliases, a depdendency of #244. Aliases look like normal `A` or `AAAA` record sets, except that the values are instances of `AliasTarget` instead of `AData` or `AAAAData`.

ex.
```java
ResourceRecordSet. builder()//
.name("fooo.myzone.com.")//
.type("A")//
.add(AliasTarget.create("Z3I0BTR7N27QRM", "ipv4-route53recordsetlivetest.adrianc.myzone.com."))//
.build();
```

note that I also cleaned up some parser code.