Owner name in the case list

![screen shot 2014-06-19 at 10 32 39 am](https://cloud.githubusercontent.com/assets/137212/3328668/ed89bb22-f7be-11e3-816b-6127f9320054.png)

This is actually a separate somewhat related thing. So, `#owner_name` (not `#owner_id`) is the special symbol for invoking the Owner Name feature. `@owner_id` is the syntax that needs to be used in an xpath (owner_id is an attribute in casedb, rather than a subnode like most properties). Adding this line means, "when the user types in owner_id, transform it to `@owner_id` for use within the xpath".

This lets someone more easily do a calculation off of owner_id, by more intuitively typing in 'owner_id' and rather than '@owner_id' and then selecting Calculate and doing what they want with it.