start of idw qmed donors
idw qmed donors
Small improvements and fixes to qmed analysis and selection of donors
Store distance as attribute
test qmed improvements
test qmed improvements
test qmed improvements
idw default power 3
replaced all coordinates with a `Point` object.
bounding box for qmed donors
speed up qmed donor search
code tidying
code tidying
default idw power of 3
comments
tweaks to qmed donor catchments
doc updates
Merge pull request #31 from faph/feature_qmed_idw_donors

Feature qmed idw donors