Update PolicyMap::Client to sanitize :boundary_types options and convert :all to a comma delimited list of boundary type ids
Fix a typo in showing headers when connection debugging is enabled
Add updated list of indicators
Sanitize :indicators option and convert :all to a list of indicator ids
Pass through the raw result keys
Update containment_search to work with the v2 API
Fix duplicate indicators for median gross rent

One is for the year 2000 and the other 2005-2009
Rename :median_gross_rent_2000 back to :median_gross_rent and rename the "new" one :median_gross_rent_2009

I don't know why there are TWO median gross rent indicators.  It used
to be a single indicator with multiple time frames.