Allow for complex queries in API

[JohnOmernik]

As of my latest testing, I have found no way to complex queries within the Python API. For example, if I wanted to do a query in the UI where the registrant name was bob AND the mx ip was 1.2.3.4 I could do this.

Or more spcifically, I can do ANDs or ORs of the same field for example mx_host = mx1.google.com AND mx_host = mx2.google.com.

While this is a specific example that I struggling with now, at a higher level, the API functionality should be at parity with the UI functionality so that folks can interact with the product at both levels and not run into road blocks.