Python-omgeo

------------------
* Cast Nominatim coordinates returned in JSON from string to float.
This was causing an error in the SnapPoints postprocessor added
in v1.3.3, as the processor was attempting to evaluate mathematical
equations using strings instead of numbers. A test was added to
check that the types of the coordinates are successfully converted
to floats.
* Add test for SnapPoints postprocessor.
* Change __unicode__() method for places.Candidate to display info
indicating null or empty values, instead of just displaying "None".

------------------
* Add SnapPoints postprocessor.
* Fix bug in tests (Bing was not being used even if the environment
variable BING_MAPS_API_KEY was set.
* Simplify ESRI ZIP processing
* Improve logging

------------------
Fix bug in ESRI geocoders in which defaults were appended
rather than overwritten.

------------------
Refactor test runner. Support multiple fields in GroupBy
processor.

----------------
Add ESRI SOAP locators as supported geocoders. Added suds
dependency. Remove default rejected entities from BING setting to a
postprocessor. Refactor constructors to fix bugs caused by mutable default
values.

----------------
Add Citizen Atlas (Washington DC) as a supported geocoder.