[SoC] Distance Raster in PostGIS Raster - Report Week 10

[Qing Liu]

Hi,

My Week 10 report can be found here:

http://trac.osgeo.org/postgis/wiki/PostGIS_Raster_SoC_Idea_2012/Distance_Analysis_Tools#Week10Report

I will have to speed up to make it up to the time and progress lost
from last week's absence.

Best,
Qing