Initial technologies set added for "single family"

The micro segments JSON now includes the full breakdown from AEO by end
use/technology for the “single family” building type, with a few
groupings added.  Note:

- For the electricity fuel, “TVs” is used to group AEO end use
categories “TV” and “set top box” , while “computers” is used to group
AEO end use categories “desktop PC” and “laptop”.  Other more detailed
AEO electricity end use categories not broken out here are accommodated
in “other MELs”.

- As in the commercial sector, heating/cooling technologies are broken
into “supply” and “demand”, and the only “on site” electricity end use
specified is for solar water heating.

- Again, census division will probably need to be added as the highest
level on the hierarchy.